Some folks will say to keep getting opinions until you are comfortable with the diagnosis. If you look at my signature below, you will understand the value and the quandary of second opinions.

Some people will say don't look for trouble if none is evident. But, we know our bodies and when something is amiss, we usually know it.

I would say to be watchful but don't let it consume your life. After having enough opinions to tell you you don't have anything to worry about...stop worrying. At some point you will need to, and be able to, trust your doctors. Life is too short to waste on unnecessary worrying.