Sorry about your probs man. From my unknowing of the heart that much I can only say 1 thing, it seems that you are afraid to die (normal) and u dont want to die yet, and u are making every precaution to staying alive (which is good as well) but just check with the doctor every so often, mayb your having anxiety at the same time? And trust me, thinking about it, will most definatly make it worse, but if u feel its really seriouse u may need to call 911, just to be safe, definatly switch doctors to get differnt opinions, not everyone is right of course.
Hope you get well, and live a long, happy life til the age of 110!!!
you sound like ur good from the doctors opinions (get more opinions tho)