Do I have OCD? My mum thinks I do this stuff for attention how do I tell her I don't?

I have trichotillomania (compulsive hair pulling), when I wash my hands I have to rinse the tap handle because of germs, I have to put tissue on the toilet seat, if I have to open a door and can't wash my hands I use the bottom or edge of the handle and sometimes wrap a piece of clothing around the handle so I don't touch it. My mum says I try to make it worse to be "special" but I don't and it really upset me. I don't want this to get worse but I think it is and I don't want to end up having to turn on and off the light switch loads of times or something. I've been to talk sessions with a psychlogist but it didn't help as I could'nt open up. I need help, do I have OCD?