Emotional! !

I'm not sure what to do, Im 36 weeks and a day, this is my second baby and I'm going through the motions. I feel extremely overwhelmed and Im crying over everything and I feel like Im going to rip the hair off my head. I've talked to my doctor about it and he said that it was normal to be emotional but I wasn't this bad with my first one... But what bothers me is Im a stay at home mother. The only thing I have to do is cook and clean and of course take care of My son. My husband takes care of the bills and the only time I stress is when he stresses. Which he hasn't stressed that much recently And he has even been concerned because I wasn't this way with my first one. Heck it even has had my three year old worried and he is constantly asking if I'm ok and I even have to go to the bathroom sometimes to where he doesn't see me so upset... Is there anyway I can about it as far as trying to get myself under control and to keep calm??