Like said, tachycardia is a symptom not a disease. If the doctor did not diagnose you with anything, it's likely just anxiety. We aren't doctors here and can only speculate. If the doctor thought something was wrong, they would have given you a device to wear that monitors your heart rate over 3 days.
You never even posted what your heart rate is, cross referenced by age/sex/BMI.
Trust the doctor and come to the conclusion that there is nothing physically wrong with you. Anxiety can have powerful effects on the body, most notably by increasing your heart rate. When you notice your heart rate and think it's high, this creates more anxiety... which then speeds up your heart rate even more. It's a negative reinforcing loop.
Switch your mind to something else. Trust the ECG. Trust the doctor. Learn not to trust your anxious thoughts. Don't believe everything you think.
Also try putting it into perspective. Exercising makes your heart rate go up tremendously, but it's not dangerous.
I may be stating the obvious, but if you are naturally this anxious about your heart rate, you should avoid doing drugs.
I have seen so many posts exactly like this one, "I did drugs once and ever since my heart rate is high". It's very common. What is most likely going on is they started paying attention to their heart rate for the first time in their life, and now are anxiously obsessing about it, compounded by the sociological fear of drugs being harmful.
even if the doc would thought that, he does not have that device himself. you need to get it from somewhere else a specialist not the regular doc.
he only has long time blood pressure but not long time EKG ecg
I put the heart rate in there. m 35 pulse went from 60 to 90 in rest. never had any problems before, also always lower pulse than now, could also bring it down actively with breathing.
I am aware of negative reinforcing loop.
-Switch your mind to something else. Trust the ECG. Trust the doctor. Learn not to trust your anxious thoughts. Don't believe everything you think.-
I did that, and would not be posting here if it just worked out like that.
so should I exercise or not?
to your point: if you are naturally this anxious about your heart rate, you should avoid doing drugs -> it is not natural for me. something like that never happened to me, ever before. If that would be the case I would have had this problem earlier but it is only since the day I described
to the rest of your post: I get what you are saying and what you mean, but it is not like that. I did only this kind of drug the first time, and I did not just start paying attention to the heart rate then for the first time in my life. ( resting pulse always 60, now it is 90-120, when in movement even higher)
like said before, I always knew it, I could actively lower it and it was never this high, and it went always back down before that event. I am not obsessing about it just now and no sociological fear of drugs being harmful