hiya, you could have one of two things that i know, either you got a pressure bubble in your ear/nose system which can happen during a cold, which causes huge amounts of pain in the face as you described, but if it happens again, you'll have what i get, where the blood vessels in you nose block pressure which also causes severe pain in the ears. i used to end up crying in absolute pain every time we descended on a plane, but my doctor told me to use Otrivine, which you can get in a supermarket or prescribed, and that completely cures it. mine was coz i have this weird condition with my nose, and it didnt allow the pressure to be released. if it happens again, its probably that, but if not, it was a bubble, dont worry, no lasting harm done (i dont think) it just kills!