Ears are one of the places that if it hurts, your body is telling you something is wrong. But, do not panic, they are also one of the fastest healing parts as well. Sounds like you might have gotten some water or other foreign bodies in there and just need an antibiotic to fight it off. Go to a doc in a box, and you should be fine in no time.
I use to get really bad ear infections and I still get ear aches. Theres a big diffrence. Ear infections you'll be banging your head a agianst a pillow crying out in pain. Ear aches weren't hurt that bad though. I found that putting a couple drops of hygergon peroxide (h2o2) in each ear for a couple minutes helps it to go away