Hello Jim
It really is a PITA isn't it. Had it since I was in my late 30s. Shooting pistol and flying noisy turboprops may have been causal, but I also took an antibiotic Tetracycline I think it was. I heard later that it might have been the cause.
Since yours was caused by momentary over-pressure, have you tried to reverse that pressure by holding your nose and . . . well, kind of sucking? I can do this hard enough to hear creaking in my sinuses, the only connection being an indicator that it is working.
Getting pressure back down the eustation tube is notoriously difficult - it's almost a one-wave valve in some people - but do try.
Although it's more to do with the after effects of infection, do try some saline washes with sterile water and iodonized salt - to a mix similar to salt water. I've posted on this a lot, and told of my antics hanging upside down over the bath, while trying to squish this mix into my tubes and sinuses. It has sometimes achieved good results with blockages.
END IN THE SUCTION MODE OF COURSE
This is no more than a first step to illuminating other factors.
Yours has a good chance of simply going away, but if it doesn't, don't assume it will ruin your life. I spent most of the next 30 years not really thinking about it. If I did, it was tedious, but for the most part it was just there, and that was that.
I should say that I'm a person with a great love of classical piano, and spent a long time developing ways to tune them electronically. The point being that I really needed good hearing, and I was worried this problem would put an end to it. But the defect really didn't seem to stop me doing, and indeed enjoying, what I was doing.