Mitral valve prolapse. Valve prolapse?

I have been smoker since last 6 months. I have quitted just week ago. 1) How many people approx have mitral valve prolapse? 2) i have mitral valve prolapse my physician told me not to worry about it it's regular problem, but still after reading on internet i am worried about if i'll require surgery in my 30's or 40's ? also do i need to change diet due to mitral valve prolapse ? 3) And can i countinue my running exercise and weight lifting exercise with mitral valve prolapse, because i heard that due to this exercise it put pressure on valve so heart enlarge and leakage will start between left atrium and left ventricle. 4) my symptoms are nothing just sometimes pain in left chest it automatically goes away (my physician told me it's due to anxiety i m taking about heart), i don't feel but i can see little vibration over my chest here i am attaching my 2D echo results. I have done TMT test and it also comes out normal.