I'm 17 years old, I was not born with any health problems, I was outgoing, I never drink alcohol, coffee, energy drinks. I never do narcotics, I don't use any medicine -- still, I got sinus tachycardia, now my heart beats 90 bpm or more every single day for nearly a month, except when I sleep. Doctors said I'm fine after x2 ECG, x1 24h Monitoring, x1 X-Ray, x2 Blood Tests.
I can't believe I got this. It's unreal. I have no reason to get it. It's deeply disturbing for me especially as I'm an anxious person. I need to know what causes these things, it can't happen all by itself, simply not possible, that would defy logic...