L.C.
You have to do what makes you feel sane at the end of the day. I know alot of people come down with a hard opinion on either side of this issue, but I really think it is something that only you can decide.
I am a SAHM of five who has been home about 7 1/2 yrs. and there have been bunches of times when I have felt lost in the lives of my family. We would save more money with me staying home than with me working and I still have two that are pretty young (2 and 1 yrs.) so I am here for a bit.
I think if I were still feeling conflicted after a month, I would find some other options. If that is what you have to do, you could still find ways to get out there a be your own person. Hobby Lobby or Michaels have all kinds of arts and crafts classes and even cake decorating. You could find some local places that do cooking seminars, or hook up with the local tech school or junior college and do some adult education. I plan to put my two in mother's day out for a day a week and take a cooking class or volunteer at the local children's hospital.
I hope it all works for you, and in the event it doesn't, don't worry there are still other options for you. I promise it isn't all or nothing. It's just a matter of finding the way that works.