Hi, I would talk to your OB they should be familiar with what you are going through. Womens hormones change with the birth of a baby and you can be experiencing Post Partum Depression. It is quite common. I know a good MP3 recording for this problem that you can get at www.journeysinwardhypnotherapy.com or http://journeysinwardhypnotherapy.com/self-hypnosis-mp3/women-health/post-natal-depression-hypnosis
I have suffered this same thing and the sooner you get help for it the better. I would get some extra help with the baby so you get the much needed time for yourself.
Most of all don't worry, try to relax as much as you can. There are some great relaxation MP3's on that site as well. Good luck!