DEPRESSION & ANXIETY ADVICE NEEDED ASAP

I'm trying to figure out how I can be diagnosed with depression & anxiety. I'm 100% postive I have social anxiety and about 80% positive I have depression (maybe it's just caused by my social anxiety so that's why I put 80.) but I've never been diagnosed with it. I'm uncomfortable going to the school counselor and asking for advice. I've tried looking up what I need to do but I don't know where to begin. I'm also uncomfortable going to my primary doctor (I'd rather talk to someone I've never met so I won't feel as judged). I also feel like talk therapy won't work because I've tried ranted and it doesn't make me feel better. I need medicine because the way I've been feeling has been going on for over a year. Should I go to a psychologist and talk about my problems and then will they diagnose me or do I have to ask for a mental health screening? How does this work? I don't want them to think I'm some druggy on the streets needing some more meds. I'm just in dire need of something that will cure me of this bullshit that's been lingering for so long