Random vent, of sorts

Ok, so this may be the wine speaking. But, please tell me I am not the only one out there that doesn't feel "content". It's so frustrating! I have a great family, great husband, wonderful house, fun life. I have no child constantly "milking" at my breast. The little "roll" around my middle is almost un-noticeable (especially with the duct-tape around it). They play together. Nicely, even. Hell, the oldest can even dress herself and brush her own teeth. I can go out with my husband at almost a whims notice (granted we can find a babysitter, which is a hot commodity these days). But, overall, things are good. Maybe it's that the girls are getting older and more self-sufficient. Maybe it's because my "baby" is going to preschool in the fall. I'm not sure what it is, but all of a sudden, I just feel like I "need more". I'm also at a point where I feel "that more" means it's time to start financially contributing to the family again. For awhile, I was thinking that meant that we should have another baby. But to be honest, I just don't know if I want to put myself through that again. Fine, call me selfish. I don't care. But until you experience the effects of pregnancy and post-partum depression, you have no right to form any sort of impression of my life.
Other than that little aspect of un-contentment (is that a word?) in my life, I'M SO HAPPY! That's a great feeling! Yes, there are things I'd like to change. But overall, I'm happy. Ahhh, I feel better already.
But I do think I want to go back to school. Won't hubby be happy to hear this? We only have $4000 left in school loans to pay off (unlike the quarter-of-a-mil that one of my best friends has, fresh out of law school). Poor guy.
-C