I've never heard of anything like that happening (and admittedly I'm skeptical) - can you expand on the event that caused you to lose your hearing? What did your doctors say about it?
So yes, it could be this was all just a co-incidence but the precise timing of it all should give everyone pause. I did Google for similar stories and I did find one person with a similar story who was immediately dismissed because no one ever heard of such a thing. I do wonder how many people restrain from reporting such effects since the counter-argument is to provide casual evidence or get a doctor to confirm which is often not possible.
For sure there is a gross disparity in tolerance these days and you should avoid sharing hits of THC with anyone if your tolerance is low. They'll be fine, you on the other hand may have an experience you weren't expecting.