Thanks for all your responses.
Obviously I'm not the only one to get twitches. The reason I got so freaked out is because I kept hearing that it is probably just caused by an irritated nerve or something pressing on a nerve, so then I would think, WHAT is pressing on my nerve, a big fat aneurysm?
Plus, I've come across two different internet sources in which two people who had survived ruptured aneurysms had experienced an eyelid twitch beforehand. (THAT sent me running to Urgent Care!)
Still, none of my doctors are concerned, and my CAT scan looked fine, so I guess I'll just have to let it go. So Zoie97, it probably is nothing to worry about.
This anxiety medicine is helping, I think. It's the first time I've actually ever taken a medication-for anything- and I'm pleased with how much it helps. It's called lazarepam (or something like that), it's generic for something. I'm supposed to take 3 daily, but I just take 1/2 pill two times a day.
Woodfaery, this is only my second day on medication, and actually, my twitch does seem to be disappearing. And my overall sense of fear and worry has lessened a great deal.
As for the vitamins, that is very good advice, but I am careful to not exceed toxic levels. When I said extra supplements, I meant that I began taking vitamin D (which I may very well be deficient in since I avoid the sun and don't drink milk) as well as Calcium and Magnesium, which are supposed to play a role in muscle and nerve activity.