I can't help with tinnitus itself, but I highly recommend "Eargasm High-fidelity Ear plugs", or similar devices, to help prevent further damage. They work really well to dampen loud sounds and, importantly, they let conversation through, though it sounds muffled. But you can feel the difference. They are much better than using foam ear plugs, which muffle everything. I used to go to a lot of concerts without any ear…
I tried many including the Eargasms and never found a comfortable fit. So I got molds and custom ear plugs from Westone.
They are so comfortable and high quality they often improve the quality of the music at a concert.
My only regret is not getting great ear plugs sooner, as I recently developed mild tinnitus from DJing and going to lots of clubs and concerts.
The good news is that with the ear plugs I have returned to all my previous behaviors and the tinnitus is not getting any worse and actually mellowing out.