Thanks, everyone, for your responses. It‘s been almost eight weeks now, and no relief. I saw an ENT, who prescribed prednisone for a week. I‘m tapering off now. No change. If anything, it‘s worse. I tried listening to a record yesterday, at low to moderate volume. It hurt. And afterwards the ringing increased.
Hang in there. Prednisone itself, especially at doses that require a taper, can make tinnitus worse (hopefully a temporary worsening, since pred is prescribed very often for tinnitus.) Prednisone, if you haven't taken it before, has other unpleasant side effects (for me, I get rage, feelings of doom, and insane hunger. Oh, and insomnia. Thank goodness I haven't gotten the tinnitus side effect from pred.)
If you aren't averse to Reddit, there is a subreddit for tinnitus that may be useful. Let me see if this forum will let me link Reddit...
https://www.reddit.com/r/tinnitus/