Hi Chrissy
I would suggest you see your doctor sooner rather than later - if you do have a problem you need help with, the sooner you get on top of it the sooner you'll feel better and the sooner your kids will see a happier mum.
I've added a link to Moodgym which is a great tool for giving you strategies to deal with emotional issues http://moodgym.anu.edu.au/
Alot of peoople have found it useful, maybe you will too.
Best wishes
Deb