I was talking to my dear old mum the other day, she has dementia but can recall my childhood with amazing clarity!! She was reminding me that when I was about 9 or 10 I kept complaining of a pain in my chest, and to the extent that she took me to to the doctor and obviously he found nothing. Also my wife still chuckles about my "phantom flues" as she called them. I would tell her that I was coming down with a bug, have an early night then be fine the next day!!
Also I used to think when in my 20`s that a heavy night out with the boys would mean chest pains the next day. I honestly thought that it was normal!!!
Just a thought, but have some of us had this longer than we think?