Twitching help- please read description?

iv been to doctors so i don't apparently have tourettes. throughout the year i switch between twitches. as soon as i recognize one a new one forms. i dont consider myself a really stressed person. sometimes my head bobs, sometimes i tighten all the muscles in my arm, and sometimes i blink too much. i used to wheeze just because i felt i needed to. i also know i do now have ocd. can u tell me why this happens and how to stop