When I talk I can hear myself a lot louder than usual. When I am not talking I hear a constant vibration. This is the 3rd time I have experienced this?

Blockage. Could be a blocked ear canal (ear wax), or a blocked eustachian tube. I would recommend seeing your pcp.

? Eustacian tube dys. This symptom is usually associated with changes in function of the eustacian tube [the tube that connects your middle ear with the posterior pharynx]. This can be associated with allergies, or non-allergic rhinitis. A detailed endoscopic exam by an ENT specialist might be helpful.