Stop in for a cup of coffee

How do you know you are in a-fib? When my BP and Pulse went up and when into a chill/shake they thought maybe I was in a-fib. Part of why I have a monitor on... Been on for a week. So far it has not caught anything that I am aware of. New meds seem to be controlling BP very well, only thing is now my pulse tends to run higher.
I knew I was in A-fib because my heart was fluttering like crazy, no regular rhythm at all. I could feel it bouncing around. My pulse rate was all over the place from 72-130.