Hi K.,
It's a huge thing taking on this entirely new role in life and having this tiny person be totally dependent mostly on you. You're taking on a whole new identity in addition to who you already are... and it can be overwhelming! If this lingers or get's worse you should talk to your doctor, but remember that you are making an enormous adjustment right now. It's commonly a time of self doubt and uneasiness.
For me, besides my hormones getting back to normal, it was such a help as my first born became old enough to smile at me! I don't think my feet were anywhere near the ground the day I received that first smile! Then, more and more, you really get to know this little person! After a while, you start to wonder what the heck was so great about your life before your child became part of it. It does get much better, I promise. You are still you, and you always will be. But, you're evolving into a new you... one who will know what it's like to have your heart living outside your body and someday you'll even send it off to school! Just wait until you have to leave the parking lot that day!
If the weather is nice enough, go for a walk with the baby in the stroller. The endorphines and sunshine will do you much good. I walked and walked with my first born. It might also do your heart good to let other mommies "ooh and ah" over your baby - I don't know why, but that's such a wonderful part of having an infant.
Hang in there, beautiful! Things are about to get super fun and soon you'll only have a vague recollection of this awkward period. Big hugs and congratulations!!
~ T. K.