Slowly Going Insane

My parents don't believe in Depression and that type of Mental Disorder. So whenever I act sad or ask, they just make comments about how I'm, "A Drama Queen" I had a panic attack once, and they just completely ignored me, then proceeded to get mad at me for having one and, "Scaring my friends" Hah hah, they act like I'm trying to Scare them. It's not like I can control it. It makes me more and more mad, and my thoughts are getting more and more violent! Plus, they won't get me a good therapist, so I can't do anything, and I don't have any money to pay for my own therapist to talk to. Help!