I have tinnitus, since 94, when a local metal band did some feedback from hell. First years was hell, but you learn to adapt it into normality. But it is worse in periods with stress, lack of sleep etc. Also lost some volume, as i keep asking "what" a lot more during the years. But what you are speaking of is quite normal when going to gigs/rehearshals, mostly it will turn back to normal in time. But some defects in your ears is bound to happen if playing noise i guess. For me at least it is impossible to record or play live at sensible volume all the time, sometimes earshattering volumes is required.