Just found out Lpa is extremely high — other risks OK

I am mid-60’s woman in great condition and no health risks. My brother, who is 68 and very active/healthy with no heart related risk factors, found that arteries were 90% blocked. The main artery is not viable for bypass or stents and the other 2 arteries now have stents. His Lpa was 440 and the doctors thought this was the cause. I checked my Lpa and it is 391. My BP is normal, cholesterol is 200 (HDL is 95) w/ ratio 2.3 and have taken 10g Lipitor for years, non-smoker, healthy weight, exercise daily and eat healthy. I’ve been worried sick thinking I could suddenly have heart attack or stroke. Seeing cardio specialist in 3 months. Meanwhile my PCP put me on 20g Lipitor and baby aspirin. Been trying to calm myself that high Lpa is a risk and not a certainty. Anyone out there who has lived with high Lpa but never developed any heart issues? Would I have any warning signs? Thanks for any thoughts.