Since March of this, I keep losing my voice intermittently. It seems to happen at any time, though I have notice it can occur with dust (my allergy test came back negative for dust mites), fumes or at any time. After running the typical allergy tests, my results came back as normal. I also had an ultrasound on my thyroid which again came back as normal. I have Hashimotos. Does anyone else have the same symptoms?