I saw my heart Dr today. I am back in A fib. He put me back on flecainide 100mg q 12 hrs, and xarelto 20mg once a day. I was already takingmetrprolol 50mg Bid. Woke up while a go with sharp pain in chest. every time I took deep breath sharp pain. Now thats past. Little dizziness but thats past. Guess I am trying to figure if I should go back to sleep or take some sort of action.