When I speak it’s like talking in a tunnel…a hollow, base sound.

Pre Covid I began having large nasal discharge in the morning, as well as a constant need to cough up phlegm.around the same time I noticed that when I spoke, it was like talking in a tunnel. After visits with myENT and primary care doctor, I got relief from the heavy discharge. My primary concern at the beginning was the voice in my head. I finally was diagnosed with Eustachian tubes that were constantly open. I had catheters put in both Eustachian tubes and tubes inserted in the ear drums for drainage. After 16 months, it hasn’t worked. I still have the voice in my head…and my hearing has gotten worse. There was even a time when I could hear music in my head…almost like soothing music coming from a monks in a cathedral. HAs anyone had/have the voice in the head when speaking and not really knowing if you were loud or not? Help.