welcome to pc, forgotten. i'm glad you found us! your story posed some concerns. like others have stated, therapy can be a very useful tool to help any of us learn new coping skills, problem solve, and disposing of "old tapes" (falsehoods) about ourselves that we believe are truths.
having said that if we do not actively engage with out therapist and speak about the things that are bothering us we will gain nothing. the therapist can only help us if we allow them to do so and give them the info they need about ourselves. your not revealing about your purging while getting help is a good example of not utilizing what we have before us to help us. i'm not busting you, please understand, just telling you what i had to learn too. i encourage you to try therapy again. there is much to unravel here and i feel you can benefit as i did with the assistance of someone qualified to help.
hope this reply may help you in some way. i hoep you will continue to post and seek answers. that is a positive step in the right direction.