My dad has never fully believed my diagnosis. When I went to see a psychiatrist when I was younger he screamed at me and told me I didn't need help and that I was just sensitive and dealing with "teen problems". 

When I was diagnosed he said he didn't believe it and that I didn't need any meds. When I was supposed to go on antipsychotics, he flat out refused and I became manic as a result, and had to put off a semester at uni because I couldn't work. He gives me lectures on how I can just manage it by positive thinking and he shares personal anecdotes or stories about how "everyone feels that way" and how if I tried hard enough I'd be fine. 

Lately I've been struggling more than ever. My meds make me so goddamn sleepy I can barely get up in the morning and I can't focus on studying (I'm 20 and a med student). I'm depressed and burned out and so inefficient that I'm falling behind. My doctor prescribed something for ADHD and my dad went into his usual "you don't need these meds/these meds are harmful" rant and told me not to take them.

I can't take it anymore. His words hurt and he is flat-out refusing to give me meds I need and I'm suffering because of it. He keeps telling me to just "handle things" and learn to live with it. I can't and at this point I don't know what to do.