I'm three months post AF and stopped my beta blockers three weeks ago. I felt well and thought I was doing fine but this week I've been woken twice in the early hours with a racing pulse - my guess is about 140 bpm. Weirdly, it seems to be regular and with deep breathing gradually settles within about half an hour. Also, I'm not affected during the day. Has anyone else experienced this after AF? If so, what did you do about it?