What can i do to cope with my depression and anxiety and adhd?

I’m 18 and just yesterday i threw up like 6 or 7 times because my doctor put my adhd dose higher. I also take anti depressants and i’ve been really shaky. I’m so tired of being on pills/drugs so i’m done with it and never want to drink another one of those pills again after last night throwing up. I’ve tried marijuana and i didn’t really like the feeling i was more hyper than anything.. i heard CBD oil is good where can i get it,and can you smoke it? Is there anything else i should try? I feel really down and like its never going to end i just want to cure myself and be happy and feel normal.