Hi all I was diagnosed with A fib, 2 years ago. I've been having rapid heart beats for over a wk now. My normal resting HR is 70-80, now it's 100-110. Last week my cardiologist put a holter monitor, but I haven't heard anything about results. Since it's Saturday they are closed, I am worried about my heart rate, I am also having palpitations. Don't know what to do, should I go to the ER? I am 27 and really scared!!! Someone please help!!