Try a physical therapist, not a chiropractor. In case your issues are structural look into Kent Keyser in Eugene Oregon. You won't be able to see him because you don't live in the US, but you can check out what he does and try to find someone similar in your country.
Hello~I understand your fears and concerns. I have had the same issues and have gone to the ER so many times I have lost count and every darn time I do, they do the EKG, and blood work and all is "normal" I have had anxiety over this so many times, I still feel that they are missing something, but they say they aren't and that I have health anxiety. So, I am trying to work on it, but it is not easy. My GP has told me not to worry, but I still don't believe it. I want more tests like and Echo, but they say I don't need it, if I had one, I would have to pay and I can't afford one as it is over one thousand dollars. If they thought I needed it, it would be paid by the government as that is that how they do tests over here. I fight fear over those horrid things daily. Thankfully, m blood pressure is perfect as is the rate of my heart, it is just those horrid skips which sometimes can go off and on for days. I worse a seven day monitor, the results were good, no serious beats, but I didn't have the ones that can scare me. I had to pay for that as well as they said I didn't need it, but I wanted it for reassurance, sadly, it did not give me that as I did not have some of the "atrial runs" etc that I normally have.
I hope you feel better soon and the answers and help you need, worry about them is awful, and sadly, makes them worse, I know, but I still can't stop. I refuse to take any anti-anxiety drugs, they work opposite on me. I also will not take beta-blockers, my blood pressure is low to normal and as I said, my resting heart rate is in the 60's to 70's.