If I get dunked under water, go swimming, or any sort of head cold, I always get an ear infection. Usually "middle ear", sometimes inner. Had "tubes" when I was a kid to help with middle ear infections also, but that's not uncommon.
Only thing to do is get some antibiotics, drink some nyquil, and wait a few days. Usually they only hurt like hell for a day or 2. On those days I don't play well with others. Vertigo has never really been a problem for me either.