I have some similar things, and this could be OCD. I have so many repetitive compulsions that I don't always know I am doing them (because i do them so often), but i have the symmetry thing too. When you can't do the compulsions do you get anxiety? If so then that could be a sign of OCD. Also, symptoms of OCD usually include intrusive thoughts (that you don't want and cause you distress). If you are concerned then you should consult a doctor