From an ED to intense weight gain

I feel like it's all or nothing for me! When I was 15 I suffered really badly from bulimia and would often starve myself and over exercise. I've been clean for a while now but have gained almost 100lbs since. I definitely overeat and struggle to find the motivation to exercise as often as I should. When I push myself too hard I get overly emotional and slip back into very bad habits. I'm trying to make a HEALTHY change and stick to it. I've heard making a blog or public post gives you more incentive to work harder, because I can't seem to do it by myself for myself yet. Any motivation helps! Ive decided to log all my food and exercise, as well as starting a journal logging my emotions, back pain, weight and stress. Anyone else going through anything similar. Any advice or motivation?