Hi Oliver. I think writing a letter to your pdoc is a great idea, and one that you came up with by yourself! Could you possibly be projecting a little bit when you say others think you are a fraud? Do you maybe think you are a fraud? I have had times when I am sure that others will think I am a hypochondriac when there was something really wrong with me and so I didn't seek care. I was feeling like I did not deserve care. What a typical depression thought. You are very wise to continue to get help. The Americans with Disabilities Act may help you get accommodations at college to help you get through.