As a teenage girl, I can tell you that they are the worst.

I do this. If I have an urge to make a certain noise, blink a certain way, etc, then I do it and it feels nice. I can control it but when I'm alone I mostly let out all of that pent up energy.

I have this same obsession with the number 4. I even have a habit of counting my steps in sets of four, along with other things that I do. Probably not normal since OCD runs in my family, but you'r...

I just signed up because of them.

I strongly suggest getting help for this. You are at an age where the development of schizophrenia is very possible.