I honestly don't know how you folk use them thangs.
Maybe I produce an above average level of Wax but the few times I tried ear buds they'd always slip out cause of it so I could never appreciate such cheap and available listening devices.
Personal preference aside, get it checked. Also lower the volume. I'd want to believe you could better hear music at a lower volume than you would with most pairs of modern headphones. Any sort of aggressive music, Heavy Metal being a perfect example shouldn't be listened to at full tilt for extended periods of time lest you want to develop titinus'n'shyt.
nikka, turn them shyts down on your way to the doctor and get it sorted. Even if you ain't got shyt and you just imagining things, it's best to be proactive than reactive to something you noticed early.