Possible infection in throat, voice loss

I had started loosing my voice like 10 months back or rather it starting turning hoarse. So I used to think that maybe it's a coming of age thing and the voice is changing. But recently I got some redness around my eye and I went to a Physician. While he diagnosed that I had skin allergy and gave me medicine for that, he also told me that there's a possible infection in my throat. So there's no mucus of any kind formed but I regularly keep loosing my voice all of a sudden. I don't scream or shout or anything like that. Many a times when I wake up in the morning, my voice is already gone. It's becoming harder and harder for me to talk in my natural voice. I don't smoke or eat tobacco or intake any kind of alcohol either. So what could be the reason and what shall I do?