Some 30,000 nerves along the path from ear to cortex in 4 neuronal stages. An awful lot. That would make pain and discomfort after hearing damage (and slowness of healing) a sort of canary that there might be some systemic problem with myelin or nutrition. (try "Key Nutrients for Myelin Support") and try to binge on those items if you are ready to try anything.)
I've had temporary damage with effects lasting a week. I was a sound guy and have at times troubleshooted crossover networks that peaked around 3kHz and it wasbad, but the very worst was dropping a 60lb steel theater weight onto a pile of other weights. Didn't even hear the sound but hearing went silent for 5 minutes and took a week to all come back! Also ultrasonics that were felt as pressure not sound. I recovered completely and have a rolloff beyond 13k that is probably age. But it's scary, I hope you heal!
This greg.technology gent is not just any ear blaster, he brought us Sonic Garbage ( https://sonicgarbage.greg.technology/ ) that has been featured here on HN. And check out his cheerleading offer at ( https://blog.greg.technology/ ). It looks like a good deal because I've exchanged emails with him and he is a plain spoken cheerful guy... the offer is not satire in any way.