Why do I have these impulses?

They might negatively affect my life! I have OCD, it might be connected because I get obsessed about the impulses and LITERALLY the only way to get rid of them is too do them. My impulses go away eventually and get replaced with new ones. I'm almost 18 btw. When I was alot younger like 7 maybe? I would go EEEEEEEEK! in a public place and felt I couldn't control it. Over the course of my life some impulses I've had are, sticking my finger down my throat trying to make myself throw up (JUST cause I felt like I was the only person who never did it), trying to touch my uvula but my tongue would block it as an automatic reflex. Sticking my tongue as far back as possible. (I think the next one is more OCD), if I accidentally hit something, I had to hit it s certain number of times. One time it was touching my eye balls, when I'd hear people say things like seeing how far back they can stick a pen in their mouth I'd freak out and think, now I have to do it, with my finger though. Overall it's much better now, I'm on done meds for OCD, but a little OCD remains, and more recently impulses cane back. Really recently I had a dream that I screamed as loud as possible. I woke up feeling the strongest urge to do it a certain number of times (2 or 3, my number is usly 5-6), fortunately my parents didn't wake up, but my sister heard and told me in the morning. One OCD thing that hasn't gone away is counting syllables in my head. When practicing driving, I was doing great at first, and felt really confident, driving felt natural. Then this urge snuck in my head to floor it all the way and then brake all the way all of a sudden. I was too scared to drive after that and let my mom drive home. My parentss both keep pushing me to learn to drive and seem to think its impossible to live without it, I want to go to a HUGE college or (really want) University, with more females then males, so I can easily meet a girl, I read college prowler looking for stuff like anybody can find someone here, because there's every kind of person you can think of here! Without that I (ME PERSONALLY, although some other people like me), would only have online dating because there's no other place on Earth with so many people, and they don't want a slit from a bar, because they want a real relationship, not a one night stand. And I was an outcast who NO girls liked in traditional high school, but went to another school so I could actually with (all work on NovaNet) and actually made friends easily. I did have some friends in regular hs though, I got bullied alot by the wild animals and couldn't concentrate on work. The closest to a girlfriend I had was long distance, it was serious but I saw religious differences would tear our family apart (we talked about that so early on so we wouldn't get married and then divorced). So we never met in person, but would of that problem wasn't there. I've never kissed a girl, I'm a virgin. If I can't get into college, I'm gonna be lost and its almost guarnteed ill die alone. Because there's people even in their 30s and up who have never been in a relationship or even had sex. They've been alive longer than me, if I'm so unlucky now what makes my chances any better than theirs? My grades lately have been almost just passing! Am I already doomed to get into a good college?! Please help me! This turned into more than one question. Please answer my whole problem.