This is NOT, contrary to popular old wives tales, "attention seeking behavior." This is simply your son going into his exploratory phase. The "no, no, no, no" is his mimicking what he's been told each time he tries to explore outside of his minimally small boundaries. He's working like a parrot, if you will.
The way to stop this behavior is to 1) baby proof your home for a child of 14-mos old, 2) purchase toys that are safe and age-appropriate that will hold his attention and even cater to his exploratory nature, and 3) spend some one-on-one time with your son vs on the phone or the computer. Bake cookies with him, teach him letters and numbers then how to read. My 14yo daughter was reading long before she was even 2yrs old because I wasn't able to play with her on the floor or take her to the park because I was in a crises with onset of symptoms and flares from Lupus (SLE), Sjogren's, and I was and continue to be blind.
I used letter, number, and shapes in the way of refrigerator magnets to teach her letters, numbers, and shapes as well as colors after I learned each shape represented a color. She learned to actually read to me!
After my doctors were finally able to come up with a working medicine regimen that would allow me to be functional with my child, we would go on walks and I had a fenced in area that was put up for my guide dog but thankfully it was enclosed so I could lock the gate and let us play outside with adaptive balls with bells in them so we could interact. I did basically the same with my oldest child whose 10 years older only then I had vision and our options were wider in the form that I could travel from home to occupy her by going to museums and such that catered to children being allowed to touch, even encouraged it!
Your child is not the one with the problem here. It's you as the mother. In the upcoming months you will have child #2 going through the same thing. If you don't get this straightened out, you will have not 1 but 2 unrulely children who were never allowed to explore, play, and have a shot at educational play that will help them tremendously when they enter school.
My oldest is not in her last year of college though she will be returning after her undergraduate completion next fall.
My youngest entered kindergarten when I pressured for her to be tested because she was so far ahead of other children her age not to mention her entire kindergarten class. As it turned out, she is in the AIG program (academically and intellectually gifted). She has had all A's on her report cards since she was old enough to earn a letter grade (1st grade). In 6th grade she received the Student of Excellence Award that's given out by the governor along with other awards including spending what is now her 3rd year as the school newspaper editor. She was nominated and inducted into the Junior Honor Society last year in 7th grade and takes advanced classes in 8th grade math as well as other subjects but math is where she is excelling other than English and social studies...
This is your small window of time where your child will learn more in the span of a couple of years than they will learn at any point during the rest of their life. Use it wisely! Teach your child through educational play throughout the day, baby-proof the house, add gates to off-limit areas that are not able to be baby-proofed, and let your child spend time running off energy outside in a safe environment.
One more thing, do away with play time at night. This completely defeats the sleep schedule. It is like telling your child it's okay to play now vs it's time to go to sleep now.
Work it out where your child has run himself and played himself into oblivion just before his bath and nighttime schedule. This will help because he will be tired and ready to lay down and sleep. You will have some resistance because you have given in to him for so long but that can be dealt with easily by what you are doing as far as not picking him up to play after he should be in bed sleeping. Kiss him, hug him, give him his favorite toy or favorite blanket but be certain to firmly let him know it's time to go "night-night".
One last thing, do NOT put a television in his room and let it play all night. It disrupts sleep and throws off the biological cycle of sleep and keeps the brain functioning when it should be slowing down to ramp up for REM sleep. Light in and of itself in high doses from a television is the equivolent to light pollution and will keep him awake unnecessarily as well. A soft colored glowing night light is appropriate or even a wheeled series of colors on the ceiling set on a timer but use soft soothing colors that will stop after a short time, not continue all night.
I hope this helps. Please don't take this as criticism or anything. You're a first-time mom and we all make a lot of mistakes as first-time moms. The only reason I had it nailed was because I raised my brother so by the time my kids came along, it was 2nd nature and I had taken enough psychology and child psychology classes as well as workshops on enhancing their education at young ages that I was able to implement it into their schedules, which worked out great especially considering the fact I lost my sight and then my mobility, which left me with lots of limitations that were in dire need of alterations, which I did and it worked out great for both my children.
Best of luck and I hope you stick to the routine. If not, there will be a lot of sleepless nights in your future and I wouldn't wish that on any parent. Babies are up regardless but once they are as old as your child is now, that should be a thing of the past. Actually, once the last night-feeding is eliminated, it's time to get a full night's worth of rest for the parents.
Paise
PS: One last piece of advice, for safety's sake. If you have dressers, chest of drawers, China cabinets or anything else he can climb on, it's time to anchor them to the wall! Places like Lowe's, Home Depot, and various online stores carry these anchors. It can save a trip to the hospital as well as your child's life! My oldest was a late bloomer b/c she had a vision issue at birth that was corrected surgically at 7mos so she was behind schedule despite OT/PT training to increase her gross & fine motor skills as well as getting her to run and walk without it being awkward. Her little sister; however, was practically running shortly after pulling up.
Our little one pulled an empty chest of drawers down on her after pulling out each drawer just enough for her to climb to the top before it fell on her. Thankfully, all her clothes & such were locked in the closet. I turned the doorknob around backwards so you'd have to have a key to get into her closet. I had the key on a hook high so she couldn't reach it. After that incident, we anchored everything months sooner than we did with our oldest daughter & it paid off b/c our youngest was like a monkey. She could get into the darnedest places. But seriously, save yourself some heartache, anchor down anything that can be pulled down and don't think for a second they can't pull something down b/c that's when they do it... when you believe it's not possible & have given up on the idea of the child ever having the energy...