Re: High Lipoprotein(a)
I'm not a physician, but I know that that elevated lipoprotein (a) may be considered a risk factor for early cardiovascular disease. It has a similar structure than plasminogen, and may inhibit the activity of plasminogen, which is to dissolve blot clots. As a result, a person may experience blood coagulation abnormalities, meaning experiencing thrombotic events.
I am surprised that none of your physicians actually placed you on an anticoagulant medication, or at least on baby aspirin to reduce clotting.
I recommend seeking out a cardiologist who is more versed in a number of relevant screening tests. They can screen for a number of emerging risk factors for heart disease, to assess your actual risk, and introduce adequate therapy, if required.
It's hard to say anything over the Internet without a patient's full family or medical history. But elevated lipoprotein(a) is definitely more than "nothing". I would not worry too much at this point, either, because there are medications out there to help manage whatever risk factors you carry. I would just not ignore it from here on out, though.