I have recently developed similar problems. First for several months I had leg jerks during the day (up to 5 times), then some head tremors (would be too early for some parkinsons, being 28), and last week I was sent to emergency department to neurologist as my arm and shoulder were jerking uncontrollably every 2 secs. The jumping arm stopped being silly after about 24 hrs, and as it was after lunch, I was thinking about metabolic issues. Also, I started bactrim just two days before the arm started to have its own independent fun. I still have occasional jerks, bet 1 per hour at most. Feels great. I was prescribed clonazepam, and it seems to calm down those occasional jerks, also it reduces palpitations.
But it seems it is a strong medication, I get totally drowsy (quite in a positive way).
Did anybody have similar experiences with some parts of the body jumping like that during the daytime?