What does this all mean?

So basically I suffer from a lot of stuff. Im 11. Anyway my eyes will randomly blacken to my sight and I got horribly dizzy. I get minor headaches pretty much everyday, so now I only feel the big stuff. I have stress headaches and sometimes I really just want to lose control when that happens. I think I have OCD, because I always do stuff in a certain order. I always have thoughts, and feelings that come back to me. I have a routine for the stairs too. But I lack the MUST for cleanliness.I sometimes feel just sick and stressed out. What should I do?