Since you are singer and I believe that your voice is of a great value to you I think it would be wise to see your doctor. He will probably examine you and sent you to the ENT doctor who is medical expert for ear, throat and nose. He will determine the right diagnosis and probably present you several treatment options.
My guess would be that you have infection of the throat and swollen tonsils and since you live from your voice that is not good news. I presume that you have some rituals for your throat so it is probably best solution to continue with them until you get examined by the ENT doctor. Keep us posted and good luck.
I agree. I was a singer as well when I was in school choir and I wanted to do this for the rest of my life. But I was negligent about my health - always. I remember this day when I started to feel something in my throat.
Felling bump in my throat was a new thing for me, so I didn't pay attention to it until it really started to hurt me and I was not able to eat.
Anyway, it destroyed my voice totally and I totally needed to avoid to sing.
Do something before it is too late.