I am a little confused. Do you want to leave your baby and your husband? Just leave everything and start over?
I also want to say that you may not sorry if you were to give your child up for adoption. I was adopted and I think it was the smartest thing my biological mother did. She gave me to a family that could provide for me, loved me and wanted me.
It sounds like you need to talk to some one like a counselor. Many of your feelings sound like a type of depression that could be managed. You have several options but first start talking to your husband and work together. You need time away from teh house. Find a hobby, volunteer, join an organization. You need a social outlet so that your every waking minute is not focused on just your family but you have time as well.