Btw, before I even start this, I don't even know what section to add this into. I just need some help..

Hi, I'm Riley. I'm 15. I'm bisexual. My entire life I've dealt with bullying, but now, being in 10th grade I've had NO problems. I just have a few questions...So, I have a psychatrist and I am NOT satisfied because she never ASKS me things. I'm literally trapped in my own mind. If someone is reading this, please give me options of what could be wrong with me. I think it could be obssession. So lately, I don't know what "group" I want to fit in to. I know, it sounds crazy but it's been going on for years now. When I buy clothes, I either go the preppy look or the hipster look. I can't choose which one I want to be. The fact that I seriously worry about it is what drives me crazy. I think it's obsession because, like when I want to be a hipster for a day, I do research. It sounds crazy right? Like it's crazy enough to like RESEARCH what kind of phones they have, the cigarettes they smoke, music they listen to ect. I can't really tell anyone about it, because I come off sounding crazy. On other days, I want to be a prep. I plan on what car, I'm going to have, plan on the music I'm going to listen to, I quit smoking on those days. I also want to act straight on the days where I want to be a prep. It sounds crazy, and I KNOW I sound crazy saying this. But this is my last resort. What is wrong with me? I do a total change up of my personality on some days and I can't determine what group I want to be in. I sit and think about it all the time. Like, it got to the point where I was planning to be a hipster this summer. I was going to totally change up my look, and then the days where I hang out with my preppy friends, I would change my clothing and attitude and such. Can someone help me? I'm lost in my own mind on who I want to be. Here's an example of what goes through my mind. I was looking at what car I want for my 6th birthday. I wanted the Nissan Altima...in the back of my head, I was like, what about those days I wanted to be a hipster, hipsters don't drive nissan altimas. Another example, (btw, don't judge because I don't smoke pot to be cool, I don't do it in public, and I'm responsible with it, trust me) I think about smoking pot when I'm in my prep stage, but no preps that I know do it.Another example. I wanted a regular case for my iphone, then in the back of my head, I was like, those days where I want to be a hipster, I want this case. I'm also worried about how people will think of me. Like I don't fit into a group. I'm scared they will be like, he can't make up his mind on what he wants to be. If you read this, I appreciate it. Because no one else gets it. Please write back. Btw, for further information. I'm not suicidal in any way shape or form and I'm currently on Prozac.