Binge eating can decrease our energy, lower our self-esteem and leave us feeling powerless to do anything about it. It can also be a vicious cycle.
It may be worth having a doctor evaluate you for depression.
I think dealing with the emotional stress may allow you to return to your previous diet (depending on how entrenched the behavior has become).
Dr Beckerman has a blog with some useful weight loss and healthy lifestyle tips. Some may be more applicable than others. For example, sleep, may be impacted by the stress perhaps making it a good area to start working on. ??
The emotional eating expert also has a website (shrinkyourself.com) that you may find helpful.
I think you've already made some headway by recognizing that the stress is causing you to eat in a less healthy way...and the less healthy eating is making you feel bad about yourself.
I think the first step is try to break that cycle - rather than targeting food to start out, focus on how eating affects you. The fact is, we all make choices at times that aren't the best for us - that's okay! At the end of the day, our health is a very long term (we hope) investment, so try to look at things with more perspective. What you eat on a particularly day doesn't need to be the determining factor in how you feel about yourself. I actually think it's great that you recognize what's going on - I think it's your first step in fixing it.
I know it's easier said than done. But I also know that it can be done! Take care.