Erm, yes. Even if you're not flying, tinnitus is tedious.
You'd have to be unlucky to get a lot of damage with one concert...I don't really know, but it sounds like the kind of place that I would pay not to go to...but, when I do get stuck with high noise levels, I'm to be seen with wet napkin bits sticking out of my ears. To hell with looking cool.
(The paper being wet, makes all the difference.)
There has been quite a bit about tinnitus on this forum, not least of all from me. My feeling is that you will have to wait and see.
Worst case, you learn to live with it. Best, it will fade with time. Up to the age of 65, I had good hearing, except where the whistle cut in at ( my measurements) 6,240cps. It fell like a stone at that point.
Be cautious about the use of antibiotics. Some seemingly can make it worse, or even cause it. Tetracycline I believe is the worst offender.