Thank you for you response. I'd love to visit New York (City?) once more and go to all these jazz clubs...
Hearing damage is cumulative, but is tinnitus cumulative as well? I have the idea that my increase in T is different from the noise-induced T I already had. My new frequencies vary in volume, where I hear them and sometimes even in pitch. They also seem to be the loudest between 2pm and 6pm. My 'old T' is exactly the same, always.
I still find it a strange sequence of events: one more rehearsal (85-90 dB max), feeling alright for 12 more hours and then,
BAM!, Full-on T. Although I must admit that at that time I just came out of a very stressful week and was low on sleep.
Taking an OAE seems to be a good idea, I'll see if I can get one. If my hearing is okay and not declining, my T is probably caused by something else which means I can continue to play music without worsening the T.
Update:
I took a three hour test today and I was just trying to wing it. The T was somewhat manageable, but I could still feel the effects of the stress I've been under for the last two weeks. It's not going to be an A, but with a bit of luck I'll still pass. It feels horrible to hand in substandard work, but... it's all I can do for now.
I'm hopeful that I can continue studying and eventually get my degree.
I didn't go for the headphones-and-crickets option, as I wanted to see how I'd do without. And it might be more a distraction than something that'll actually help. And I'm a bit scared of headphones. Maybe, for the next exam, I should just bring live crickets
I also had an audiogram made today, which came out slightly worse than my previous near-perfect one. Probably because I couldn't concentrate, I could hear my heart beat loudly because I'd been cycling fast and went straight in for the test, and the previous test used sine waves with vibrato which were much easier to distinguish from my T.
The result was still okay, slightly sub par, but nothing to really worry about.
He wanted to leave all practical and medical advice up to the medical specialists I'm going to visit in a month.
Overall, it's going a bit better with the T. I'm not sure if it has actually subsided a bit, but it seems to have gone from 'hearing a siren' to 'hearing a loud and annoying tv-beep'. I'm optimistic, but I still refuse all opportunities to play music. Just to be safe, just like you said, SoulStation
Next up: Monday, GP appointment to discuss the prednisolon. I'll probably also ask for a blood test, just to be sure.