I have had problems with acid reflux and did have hoarseness when I was first diagnosed, about 6 years ago. I had to have vocal therapy for six weeks. This seems different in that I am not hoarse when I talk or sing low notes, I just don't have a voice at a higher range and that I am straining to get anything out. It is possible though and I have not ruled out the acid reflux. Thank you for your suggestion.
I would think it was caused by the acid reflux. Is that under control? Consider taking Metamucil capsules 5 of them with water at night. The gel that forms seems to keep splashing under control for my boyfriend, plus the fiber makes everything work better.