I agree, cut back/stop caffeine (includes no chocolate). And, if you stomach can take it, I recommend an aspirin a day, at meal time. If this doesn't help (the aspirin is mainly to reduce chance of clot formation from a flutter that could be an atrial fibrillation), or it gets worse, talk with your doctor.
Try not to think about your heart, anxiety can also be a cause of rhythm problems.
they are probably flutters when you have a feeling in the chest of your heart going out of rhythem for a few seconds i have them alot. ,my go said everyone has this and that it is normal from time to time. its when your heart races for a long period of time that may need checking out for tachycardia just and case it needs treatemnt lots of things can cause flutters though stress coffee tea anything with cafine workout etc