I take Pradaxa for thinning blood and Tiazac (generic for dilitazm ? Spelling) to regulate heart rhythm. One way l can tell that I am in Afib and Aflutter is I am overcome with fatigue and feel like I must sit or lie down. I usually fall asleep almost immediately and wake up an hour or two or three later no longer in a fib. I sometimes feel a bit weaker for the rest of the day. I believe that by the time l feel the fatigue l have been in a fib a while. Also have shortness of breath. I am 82 yrs old and had a fib for some time before diagnosis 15 years ago. My concern is l don’t want to do further damage to my heart with these a fib episodes of which l am unaware.