What does everyone do to get motivated to be healthier?

I'm a diabetic who has had two miscarriages and gained 25lbs since this summer. My period just isn't coming this month and I know it's a weight/health issue. I know what to do and how to do it but my motivation is zero. When I think about my losses and my want to conceive, I end up in a depression instead of getting a push to do better.

Has anyone else had this problem? What do you do to push yourself to the gym and away from emotional eating?