There are really only two things I can suggest -- first of all, if there's any way for you to compartmentalize the three stressors a bit, that might make a big difference. Just try to deal with one issue at a time, and while you're dealing with it, allow yourself to ignore the others. And when you DO deal with it, give yourself some props for getting through it. Then you can move on to the next thing.
And second, can you find an hour to just devote to yourself? Even if you just take a walk and then a nice bath. Something quiet and a little indulgent, without being full of calories.
I hope things get better soon!! In any event it's good that you're recognizing your "relapse", and that you're getting support here. Last month I totally let mine spiral out of control, stopped posting here, and gained 8 lbs. Blech. You're obviously taking the steps to nip it in the bud before that happens, so good for you!