you are probably going to need to get the lens professionally cleaned as the water will probably leave marks on the lens elements, and if it was salt water then you will need to get the salt residue cleaned form the lens otherwise it will rust..

from the sounds of it you didn't get much water in it - PUT IT IN THE SUN AND DRY IT OUT AS FAST AS YOU CAN - or put it in front of a heater...

I was a camera tech for over 15 years - I've had lenses come to me in buckets full of water (best thing to do if you drop a lens in salt water, or dirty water - rinse it in a couple of changes of fresh water and send it for repair ASAP)...if it's clean water then get the lens dry asap - this will cause less damage, and reduce the chances of the electronic parts suffering from rust etc down the track (yes ALL AF lenses have some degree of electronics in them - even if it is only a flexible PCB that tells the camera at what focal length the lens is zoomed to..)

get the lens dry as fast as you can, and then see if there is any damage...