I am a stay-at-home mom, should I go back to school now or wait until my child starts kindergarten?

That's tough. You obviously want to work. And if you know for a fact that your children will be well taken care of, I don't see why you shouldn't go for it. But you also must realize that with children it won't be easy. If you are prepared mentally and physically to take it on, go for it. If you have support from family and they will help you. But everyone needs to find something they like to do for work, b/c if you don't like it now chances are in 5-10 years you still won't like it. And it is better to get an education now. Hope everything works out!