I have OCD too. Diagnosed when I was 15, and I'm now 22.
I still have therapy (private, NHS is awful about mental health), and i'm getting better. When I was first diagnosed I had to be sedated and put on heavy medication. I never wanted to leave my room, as I was afraid I was going to get infected or pregnant. I couldn't sit on chairs, if a person touched me I had to wash my hands, found it hard to even get in my own bed which once led me to trying to sleep standing up on my cupboards.
I had to get changed about 3 times a day because I thought my clothes were dirty. I couldn't sit on my own toilet seat, could never go to public toilets. Nobody could come into my room apart from my mum. Use to hoard stuff and check things, especially my window to see if it was locked. Had to go through all TV listings before I went to bed, just incase I missed something. I'd cry with anger and frustration to the point where I even cut myself.
My problems all stemmed from my irrational fear of pregnancy and self-doubt. I thought dust could get me pregnant/chairs/if a man was to touch my hand etc...Because of this I could never have a sexual relationship with my boyfriend of 4 years. I still can't, but I'm nearly there.
But yeah, I'm getting better now. I'm starting to come off my medication. It's slow, but I'm getting there. I still have irrational thoughts -- but with therapy I'm learning how to deal with it, and my rational brain is slowly conquering the OCD side of my brain. It's been a long journey, but I can finally see the light at the end of the tunnel.