I was just trying to go to sleep, but my heart won't slow down. It seems like it's beating to fast though i checked my pulse and counted 41 in 30 seconds - which as I looked up is not abnormal. But it's 11:00 and i work hard all day, get up early and usually am exhausted by 9:30. Why can't I go to sleep. feeling shaky too, never felt like this before. I'm in pretty good shape, exercise regularly, but don't feel right at all