I am 21 and I’m so fed up with these palpitations!! The last 7 months I’ve had racing heart which I ended up in hospital for a few times due to having huge panic attacks at the same time and getting so worked up. They have never found anything each time just that my heart was 150 once or twice but I was really worked up! My rhythm was still normal apparently so they wasn’t concerned. I’ve had loads of ECGS a chest x Ray and 24 hour monitor nothing’s came back apart from like I said the fast heart rate but once I had calmed down it came down on its own! The last 2 months I’ve not had any of these episodes but now I have skipped beats where I feel like it’s stops then thuds after and it’s so scary, I’ve been told they’re not dangerous but they sure feel like it!!!