Chocolate is NOT the answer!
I had an absolutely crappy day yesterday, and it would have been so easy to turn to choccy to make me feel better...but you know what? It wouldn't have made me feel better in the long run. I would have enjoyed it for about 60 seconds and then the guilt would have kicked in - I'd have sabotaged myself, been weak, given in to cravings etc etc.
Part of SW, I think, is re-educating yourself about food and breaking the habits that helped us gain weight in the first place. If you use food as a comforter when you're stressed or upset...or happy or angry...well, that's just asking for trouble! In the longer term, it doesn't help. So try to address your anger and upset with OH by something else. Weirdly, I quite like cleaning. Anger cleaning! I put loads of effort in, vent my frustrations bashing the hell out of the cushions and vigorously vacuuming...and I feel better, and also have a cleaner house! Exercise is a good frustration-beater too.
However! If chocolate is the thing you really, really need...then have some. Just a bit. And SYN it. It's totally workable into your weekly Syn allowance. Have 10 syns worth then just knock 2 syns a day for 5 days off. Voila.