I need help

I’m 7 months pp. I’m bulimic. I hate myself and my body. Racially I understand why I don’t and shouldn’t want to be this way. When I’m pregnant it’s easy for me not to give in as my body isn’t mine anymore. I don’t want to be like this anymore. I’m now 17st, I want to be 11st and I want to do it healthily. I want to be healthy. I just don’t where to start without turning it into another compulsion. I feel like I’m drowning. Why is so much of my self worth tied to my weight? I have 3 children and the baby doesn’t sleep so absolutely no energy. I don’t know how I let myself go so much. Can I get to where I want to be? Will that be enough? I can’t do this anymore.