Bulimia- wishing to recover finally.?

Okay well. I have been battling with Bulimia and Anorexia for some time now. The issue with this is; I am realizing what impact this sort of behavior has on my health and physical/emotional self. My hope, and question is; while I hope to recover, this is not just something I can do out of the blue; is there a way I can stay healthy or at least healthier amidst this trial. Foods or supplements I can take? What sort of steps should I take towards recovery? ( I can't seek professional help as my parents are opposed to this). What ways can I raise my self-esteem, and self-image? Part of the reason quitting is SO difficult is because I also struggle with OCD. Is there away around this? What ideas do all of you have? I need to get myself out of this mess-once and for all-. Thankyou. (oh, and so you know where I am at- I am 17, 5'3 and just under 90 pounds)