Hello

I've recently been afflicted by a low high pitched sound in my right
ear but I can't really understand why it has happened, I don't listen
to loud music and I've always been cautious when it comes to high
volumed music/noise. The only two reasons I can come up with are
either that I'm a swimmer and I tend to dive too steeply from time to
time which creates pressure on my ear drums or my laptop computers'
very low but pretty high pitched hard drive sound (I spend a lot of
time in front of it). Can these two things be valid causes? I've been
hearing this sound for 4-5 days now, any chance that it'll just fade
out? I'm 21 by the way, if that might be of any help.