I sincerely hope it never happens again while I am playing. Luckily I was very familiar with most of what we did because I was doing it mainly from memory. The one hymn which was new to me, I struggled with a bit. It would be awful to have that happen in the middle of an important recital or something.
I used the headache remedy the doc gave me, plus the 2 he gave me for my back. I don't know which one did the trick; I think it was the combination.
I don't care what it was; just so it worked.