My daughter has 6 children, as of right now they are 11, 9, 6, 3, 2, 1.
The 3 and 2 yr. old are 11 months apart and the 2 and 1 yr. old are 13 months apart. We are raising several of these kids and I can tell you it has days where I want to pull my hair out and call someone to put me out of my misery...then there are the days when they all play together and only want to give hugs and kisses and snuggles.
We have legal guardianship of the 6 and 3 yr. olds and are looking to take the 2 and 1 yr. old too. That is 4 children Kindergarten and under, 3 in diapers/pullups and one who wears pull ups at night. The 3 yr. old just turned 3 a couple of weeks ago. and the 1 yr.old was deaf but had his ears cleaned out and has tubes, he can hear now.
So, no, you're not crazy, those days will come...lol. It can be done, housework may not be, laundry may not be, but you will enjoy parts of everyday. Mostly naptime and after bedtime for the kids. I love my life, I wouldn't give any of these little ones away or I would be missing out on the best thing in life. We do soccer, T-Ball, dance, gymnastics, and tumbling.
So, my advice to you...make it simple, do things the lazy way, use paper plates, plastic flatware for lunch. Plan ahead, learn to cook big meals on the week ends when your husband is home and freeze parts of it and then you can just heat stuff up. There are web sites that are all about cooking like 10 lbs. of hamburger, sectioning it into smaller amounts, freezing it , and using it over the next week and just adding specific ingredients to it and each night it's a different meal. Like one night tacos, the next beef stew, the next it's spaghetti.
It can be done and you will be great.