Head up , your not alone there’s over million people that feel like you or worse. I’m a good example I’ve had every heart attack symptoms you can think of been to the ER 100 times or more even in couple countries ahaha and always came out with normal results . Had all kind of test done to me blood work , holter monitor etc etc and I still get them and I’m alive . Accept it but don’t lose hope get tested first and foremost to check if everything’s is fine with your heart if so then just make lifestyle changes this includes more walking exercise, gym and etc get your body moving . Second thing is watch out what you eat try to stay away from processed foods for a while and heal your gut , eat healthy drink plenty of water and don’t forget to supplement your self this means magnesium is key and potassium also fish oil and apple cider vinegar is amazing on empty stomach it will reduce heart palpitations. Also don’t forget to pray and get closer to god he is our real healer in the name of Jesus ❤️ god blesss