A while ago I was convinced the muscles of my face were twiching, and it was ONLY a result of anxiety.

If you have some insight that you are a hypochondriac, that's a good thing, believe it or not. People with disorders like that usually don't have any insight or awareness that their thoughts are irrational. Is there something else bothering you? Sometimes people are worried about other things, and the worry about catching an illness distracts from what the real issue is...

Anxiety can do all sorts of weird things to you, like make you dizzy, twitch, or give you blurry vision.