I get pain, twitches, what feels like vein twitches, and tingling in my legs and arms off and on sometimes. It may be hard to believe but it just sounds like anxiety to me. There are reasons that the main fears of people with anxiety are strokes, heart attacks, heart diesease, blood clots, and ms. The symptoms of anxiety mimmick the symptoms of all of these so well, that it is so hard to tell yourself that you're okay, even with a perfect physical checkup.
I think you should try eft. It's so amazing. Emofree.Com
it gets pimped on this board all the time, but I just recently tried it and it is totally working for me. The first time I tried it, I had total relief of my underlying anxiety and negative thoughts from the middle of the day until the next day, from just a few minutes of tapping and repeating statements to myself! It's cost and risk free, so there's nothing to lose.