Should I get checked out?

My older sibling keeps telling me that I have OCD. He says this because I'm a major germaphobe, I have violent thoughts, when I'm touched on one side I have to be touched on the other, I clean my soap, I wash every time I touch anything or see a sink, and I have a tendency to fold moist paper towels into squares, although I don't see that much of a thing but he insists it is more of a compulsion.