thanx for your response...i didn't get to my doctor's appointment this morning for other issues...now i am really frustrated...i had a horrible night...once i tried to fall asleep my heart suddenly started racing...and along with it i got a hot flush feeling...took me about an hour to fall asleep...and today i've felt all jittery, tired and lightheaded...beta blocker isn't working...i wish this was just anxiety or something...but i doubt it why is it happening in my sleep and when i'm most relaxed or trying to do so...my appointment is until next thursday...