I'm going through the same thing for the same reasons. throat soreness, loss of range, and too-easy strain led to doctor's office. He said I had "silent reflux:" reflux without any associated heartburn. Occurs in 15% of reflux patients. Good to have no heartburn; bad to not know something's eating away at your innerds. Upper GI showed little damage to esophagus, but video stroboscopy showed nodes and acid scarring on vocal chords. Resultant chronic sinusitis will require surgery next week. I now am on a draconian anti-reflux diet, need repeated sessions with speech therapists to correct gutteral speaking voice to a "softer and more forward phonation, and must alter my singing delivery if I hope to sing anymore. Reflux is being treated with Prilosec (doctor offered it as a cost-effective alternative to Nexium), a nasty diet with no beer, tomato-based foods, soda, coffee or chocolate (the Guantanamo diet) and elevating the head of the bed. As my non-throat symptoms are "silent," I will have a hard time getting off this diet. It sucks, but must be taken seriously, especially for someone who takes his music seriously.