What's wrong with me?

For the past 6 months, I've felt like I was really out of character and I didn't know who I was anymore. Since I'm young (just turned 17), I figured I was going through an identity crisis that would blow over eventually. But the feeling of being lost was bothering me and I decided last week to smoke a joint with a friend and just chill out. The whole time I was high, I was self-conscious around my buddy and all I could think about was how crazy I am. I tried to sleep it off but I was so damn paranoid about being insane. I couldn't fall asleep and I think I eventually convinced myself that I'm crazy. After I woke up from that, I feel like a whole different person. My brain activity feels dead. My head is completely blank, unless I bring up a topic to think about - which then I'd think into depth and over analyze. I tried reading, but I can't indulge in the story anymore. I tried to occupy myself with friends, but I never know what to say. I try explaining how I feel to my friends and my mom, but I don't think they believe me. My mom's looking for a therapist, but I don't think that will help. I think there's something wrong with my head. I don't think I can live my life like this anymore. I've never felt this scared before.

Hi, pugmeat! Talking to a professional might help, it's going to be ok. This might be anxiety and a bit of dissociation, I've heard other people talk about this stuff. Be really honest with the psych and tell them what you've been thinking and feeling and ask them for help.
How are you doing?