I'm in this club ladies! - horrible ectopic heartbeats, also bouts of rapid pulse. Cardiologist said my palpitations were hormonally linked and also caused by stress. GPs seemed to be clueless. One GP told me I could never have HRT because of 'heart problems'. Cardiologist said this was completely untrue and HRT would probably help!
I take low dose of the beta blocker bisoprolol daily (1.25mg) and am very very careful with caffeine and alcohol.I am so much better than when I first had these flutters and skips at age 44 - now it's usually just a few a day, but worse when period is coming. The beta blocker helps my heart mostly remain calm and steady. I didn't get on well with propranolol; it seemed to have no effect apart from freezing fingers and nightmares

, so it's worth asking about other BBs if they don't suit you. I also have (occasional use only) xanax for severe anxiety attacks - which are thankfully rare - this was also on the recommendation of the cardio. The xanax miraculously stops the ectopics, so they are clearly anxiety related. This is a relief to know in itself. I had never before realised how strongly stress hormones and other hormones impact on pulse, bp etc.
Palpitations are horrible! They should always be checked out, but are so often harmless. My cardiologist confirmed that even thousands of ectopics daily (which at my worst was what I was having) they are (and I quote) 'completely benign'. Hope you find this reassuring.
Starfish x