violets, this does not sound at all like schizophrenia. It sounds like you know that this behavior doesn't make sense, and that's why you are afraid it is a delusion. If it were a delusion, you probably wouldn't call it a delusion.

I have OCD and actually mine is pretty similar to this. I jerk my head, tap on things, and repeat words to myself to "negate" thoughts that I did or said something wrong. To get a real diagnosis, though, you should probably talk to a professional. Good luck