Puffy Eye? And How To Get Rid Of Fast, Asap!?

Um I Think this morrning or last morrning i woke up with a puffy eye randomly.. its just my left eye led and it really hurts and iches a little bit..Its bothering me a lot...well iv been having late night halo 3 games till like 12:00 am or later and wake up late.. but i dont know whats causing it.. it might be allerges but im not quite sure i tryed puting a cool tea bag on it but it my my vison blurred.. sry for spelling.. tired.. and cant sleep.