Be careful, Jim, but don't get too worried. I've found myself in the same situation many times recently, and it can be scary. Most of us recover naturally with a little time and rest.
I've always been proud of the power of my voice, and I did a lot of singing and storytelling for the Cub Scouts and Boy Scouts in years past. Lately, I've been doing church music and singing in song circles, so volume isn't quite as important; but it took me a while to learn that I didn't have to sing quite so loud. Now I sing soft and close to the microphone in church if I'm doing a solo. When I sing with groups, I listen to the other singers, and strive for an even blend of voices instead of trying to lead the others. I've also found that when I'm leading songs, the audience often sings louder if I sing softer.
The best thing I did for my voice was to quit smoking four years ago. 25 years of smoking didn't help me much. I assume you don't smoke. Next thing to do is to learn to sing more softly, and don't ever try to sing with a voice that has already been badly strained. Good luck.
-Joe Offer-