Hi. I'm 29, and I've had OCD since I was little. It got particularly bad when I was 17 and in my first year of A levels. At first, I felt like I was 'different'and 'abnormal', but then, when I discussed it with my two best friends, I discovered that they also had the condition!
You're going through a stressful time in your life right now, and you need support and understanding. Do you feel able to confide in any of your friends or family members? Other people might not actually be as 'laid back' or having as much fun as you imagine, and it's likely that many will have similar problems.
Although some of my teachers were brilliant, because I didn't tell them about my condition, some were less understanding. Ironically, one of the teachers complained that I was 'too laid back', and I felt like I was on the verge of having a nervous breakdown!
I found that my OCD could affect things like my punctuality, work organisation and definately my confidence levels. Unfortunately, some teachers/ lecturers are inclined to interpret this as being 'uncommitted' and this just makes you feel even worse.
Don't feel ashamed to ask for support and understanding. You're showing a lot of strength by continuing your education and you have enough to contend with, without having to feel isolated and like you must struggle alone.
Good luck