What Causes Random Episodes Of Chest Pain And Shortness Of Breath?

I am a 28 y/o white male, in the military in good physical shape. For 9 years I have had sporadic heart attacks sharp pain in my chest that causes me to collapse. Followed by shortness of breath, pain radiating to my neck and left arm. Multiple trips to ER and pulmonary function tests never found any issues. I was reading my echo results again and I noticed that under the tricuspid valve it was written: physiological regurgitation present with a PA systolic pressure of 35 mmhg. My question is: Isn t this number high? I have a family history of high blood pressure mine is normally 140/80. I am tired of being told there is nothing wrong with me. I want to know why I am having these random episodes. Any help or ideas would be greatly appreciated, I m at my wits end.