No guarantees this will be the case for you, hope so, but on one PME, Junior doc heard a "murmur" and made arrangements for a scan at Peterborough. That's it thought I, end of flying career or worse as no one discussed the possibilities with me. Anyway, scan and follow up with specialist diagnosed JMO's hearing at fault and during subsequent appointment with SMO, he said it was quite common to falsely diagnose "murmurs".
Fingers crossed for you NDW.