Welcome to HCM
We understand your concerns
You are perfect in your explanation of the problem. Nice to hear that. Now as far as your problem goes, it is really hurting you, isn't it? As there is no problem in your ECG, you don't have to worry. If you are not satisfied with the test, find another good doctor and be satisfied.
If you are doubtful about your body conditions and diseases you might have, such condition is called hypochondriasis
(a form of anxiety
). Consult a psychologist
for further advice. I can help you online if you desire so.