OCD is a toughfy. I have it. And at times it can be a little unbareable! it completely takes over and if you don't personally have it, its hard to understand.
It effects people in different ways, for example, checking doors,taps etc. Mine was repeatedly touching a certain thing, so much so it got abit dangerous lol i tend to find it goes at times, then returns, my current ocd moments are going over things over and over! It can really wear you down and make you depressed, especially if it is all you can think about.
You have to take your mind off it, or it will drive you up the wall.
Don't let it win.
Perhaps read a book, try surround yourself with happy things/people who can take your mind off it.
Perhaps get yourself a cheerfull hobby.
I know prescriptions arent always the way forward but at times when we get so low we need help getting out of it.
They helped me out of my lowest moment.
I hope you are feeling a little better!
Sorry to ramble.