Number 1 you should not drink coffee. Yes I have had HCM my whole life. Did you know you are born with that blessed condition. Mine also is not very bad, going to be 73. Yes we all go through little episodes as you described. It is natural and when you panic is when you think you are going to pass out. I was seen by Dr Berry Marron the top HCM Dr in the world. He basically figured it out. His sons now practice in Cardiovascular also. The Mayo Clinic was highly recommendedbyDr Marron as a go to for HCM. This is a hereditary condition so get you offspring tested. Relax and no Caffeen additives.