Can Beta Blockers Cause Fluttering Sensation In Heart?

I have POTS (Postural Orthostatic Tachycardia Syndrome--a form of dysautonomia), and I m on meds to help me function as normally as possible, but recently I ve begun to get what feel like heart flip flop/flutter sensations that can last up to 10 minutes or so, and it s a really unpleasant feeling. I m wondering if this is just my POTS getting worse instead of better , or if my beta blockers or midodrine might be causing this. Thanks.