Hi funkymonkey, I'm similar to you. I have buzzing hands and feet, with a myriad of other symptoms. I first had palptiations, ectopic beats, etc. and was worried I had atrial fibrillation or something. Then my hands started tingling, and a few days after that, my feet started.
I wasn't too bad until I read about L'hermitte's, pushed my neck forward and felt a twinge in my left foot. This scared the hell out of me. Then there was a constant buildup of symptoms, dizziness, buzzing in a lot of places in the body, twitching, trembling, internal tremors (like rippling muscles, felt really weird). Then I took a week off work, and over the Christmas holidays I started to get a bit better. Cut to just after Christmas, when I was out drinking and was again feeling my pulse, which started the whole ball rolling again.... tingling feet and hands started up, and now I'm not even thinking about my heart!
I still have the tingling hands and feet, and when I bend my neck down the tingling gets very noticably worse in my feet. It all depends on how active I am - if I'm walking somewhere and bend my neck, it's pretty intense buzzing. If I'm sitting down for a while or when I wake up in the morning, I usually don't notice any twinges when I bend my neck. Other symptoms I have at the minute are mild trembling, twitchy eye muscles, bouncy/shimmery vision, waking up in the middle of the night with nerves on overdrive (ringing ears, numb feeling in face, snow/zig-zag lines in vision). It's a nightmare.
I'll be starting a slow release beta blocker this weekend (after I get a Holter monitor test done tomorrow) and I hope the symptoms subside after a while on that.
I've been to the doctor a few times, and she has given me two clinical neurological exams - reflexes, backs of eyes, strength test, etc. and she seems to think it's fine. I still have MS worries but I'm trying not to think about it. The fact that it's around a 1000/1 chance I have MS (23, male), how it's "presenting" in all 4 limbs with no clincal neurological signs, along with the fact that the neurological problems started within a couple of weeks of worrying constantly about my heart, I'm trying to be logical and putting it all down to chronic anxiety. Someone in the know please confirm my logic! Thanks!