Have sore throart, swollen glands, no voice, for a month, did mono and strep test, both negative, dr not to sure what is cauing this, why?

Hoarse - sore throat. Hello. It sounds like there may be a viral, GERD or allergy component to your ailments. I would recommend an evaluation from your ENT physician who could perform an endoscopic examination of the throat to see the vocal cords and lining to determine what the source of the inflammation is.