For the past month, I've had more throat pain. As always, it was concentrated on the left side of my throat, and I could pinpoint the spot it seemed to be coming from. So I went to another doctor today, he looked down my throat again, and he finally gave me a diagnosis that actually fits my symptoms.
I have a vocal process granuloma. (Basically, it's a small benign growth on my vocal cords/folds that gets aggravated by, among other things, coughing.) I got a steroid inhaler and some reflux medicine and was told to stop drinking so much damn orange juice. And being more careful about how I cough (!) and about how much I sing and use a loud voice should help too. And I should feel better soon!