Facial pain is very common with pain hyperacusis. An ENT most likely won't be able to figure out if there's an underlying cause, because the pain is coming from the hyperacusis itself. It can also be caused from a pinched nerve but considering the noise trauma I highly doubt it.
@Safari1999, I'm really sorry you are going through this and I was in the same boat as you. New to hyperacusis, not sure what route to take, ENTs and audiologists giving crap advice, praying things get better, then tinnitus developing and the fear of what could be next. I would be very wary with the "rule out" approach that ENTs/most doctors seem to have. Especially if they want to go the fistula route and order an MRI (you more than likely don't, your cause is acoustic trauma, do not get an MRI). Hyperacusis and noise trauma bring on a host of symptoms, many of which ENTs can't really explain or have little to say regarding it. My case is a bit different from yours but I have tons of migraine-like symptoms, also common with hyperacusis, and I've been told I have anything from migraines to epilepsy, when I had no issues prior. Hyperacusis is one big umbrella that unfortunately causes a whole bunch of problems.
If you want my opinion it would be to protect your ears early on. And when I say protection I mean use actual protection like earmuffs and earplugs. I made the bad mistake of not using protection, because an audiologist insisted it would just make it worse. My idea of "protection" was noise cancelling ear buds, which just funneled more sound into my ears instead of actually protecting them from high dB noise. After a few days of going out and continuing life as is with regular noise exposure, boom. Immediately got worse.
If you want to use earplugs I'd suggest foam earplugs and make sure that they are properly fitted, you can use YouTube videos to help you. Another big mistake I made was getting custom earplugs that barely went into my ears. The occlusion from them gave me several setbacks in a row and I attribute my rapid decline and current severity to that.
You're very young and I assume your parents think that a doctor will solve this. The truth is there are no experts. Research is just beginning to gain speed, and doctors aren't always up to date with it. And there is a lot of medical dogma regarding it. I've visited top ENTs in the country and they still insist that hyperacusis is all anxiety and depression related. It's definitely brain related for some, but not all. Pain hyperacusis is a whole another can of worms.
It's probably going to be hard to convince your parents of this though, especially with a lot of pushback on "don't believe what you read online" especially nowadays. I would suggest going to hyperacusisresearch.org and printing out some of the literature there, actual backed science about current research. Trying to chase doctors I think will just make you worse in the long run. It sure has for me.