Doctor

My 27F bulimia mixed with depression has been really bad, and it’s caused me to essentially hit rock bottom. I decided to schedule an appointment with a doctor because I want to ask for help and finally get better. I have tried over the last 2-3 year to recover on my own and it hasn’t worked. My biggest fear is that when I go to the doctor he will not support me because even though I struggle with bulimia I am still obese. My question is: What do I do if the doctor doesn’t believe/ support me? I am genuinely scared.