Hey
i get sketched out when I feel anxious, and have little ticks and things. But, just as a warning, you may be on too much medication (if you're on medication at all) -- you should talk to your doctor. I know that when I was on too much prozac (and when I was on paxil) my dosage was too high, and started to affect my nervous system. My doctor told me that being kept at too high of a dose of meds would have possibly eventually caused a stroke. Something to keep in mind. I was twitchy, restless, and anxious, and my heart would race sometimes.
Or it could just be natural symptom of an anxiety disorder -- I guess you have to listen to your body. I'd suggest talking to your doctor though, just in case.