What Causes Sharp Pain And Hole On Right Side Of Throat?

I got a tonsillectomy a year and a half ago and I healed a lot more slowly than the doctor liked (scabs didnt fall off until 28 days post op) but other than that everything was fine. These past 2 or 3 weeks however I ve had a sharp pain on the right side of my throat right where my tonsils used to be. I ve been looking at it daily and there is a hole about the size of my thumb that continues to get deeper every day while the other side looks completely normal. Are my tonsils growing back or what could this be? Ive been extremely worried..thanks.