If i close eyes real tightly i get a buzzing sound in one ear for 5 or so seconds. what is this?

Sure: There is a strange connection between your throat and ears that you may be aware of "popping your ears" or "swallowing on a plane". oddly enough squeezing your eyes closed may engage a muscle in this area. This alone changes the sound in your ears. Your carotid artery is just behind your ear drums and if you hear a rhythmic pulsing it is that. If this is your only problem, nothing scary here.

Tinnitus: Squinting hard tenses the facial skin, slightly pulling the external auditory canal and outer layer of the eardrum, which may temporarily amplify tinnitus. It's normal. Take care!