You might be struggling with some post natal depression? Asked to be referred to your mental health services and get assessed to make sure. Then if you found therapy helpful look for another therapist so you have somewhere to offload.
Are their any ED support groups local to you? Every time you have an ED thought, which I know will be all the time! try to refocus on your baby. No matter what weight you are, you brought a little life into this world and that makes you truly beautiful. Stay away from scales (easier said than done) calorie counting (its probably second nature) but remember your hormones will be all over the place still. Good luck x