What Causes Watery Eyes And Pain In The Right Ear?

A month ago I came home back from Mexico and my right eye has been draining/tearing up since then. For a longer than the last week I have had some pain in my right ear. Yesterday I bent over to tie my shoes and the pressure on the right sinus area across to the ear was so intense. Today I opened my mouth to eat dinner and it felt like I got hit with a bat behind my right ear. I was snorkeling in the fresh water caves the day before we flew home. Water in the ear? Infection? Ear or sinus? I can breath through my nose just fine, too.