Cause of the leakage of the valve can only be decided on Echocardiogram.
With mild leak in the valve and with a normal heart function with no dilatation or increase in the size of the heart, one doesn’t have to worry about this, excepting getting a yearly echocardiography done. If the valve's leak progresses, then it can be tackled by valve repair procedure which can be either performed surgically or now a days in certain good centres, even performed percutaneously.
Pinks, an echo can provide much information about the heart.
If your physician is letting you walk around, I would think you are safe at this time.
I am glad you are being an advocate for yourself.