Hi,
I had the same thing happen to me, my throat hurt for two weeks. I went to the Dr. and they said it was because of the intubation. it was worse than having strep throat...I couldn't even swallow and everything burned going down.
It finally went away, and what a relief, my sore throat was by far worse then the surgery and post lab band pain. It will go away though, be patient.
If it will make you feel better, have your Dr. rule out strep or any other viral or bacteria infection, and then just try an relax suck on halls and and spray with cloreseptic that helped numb it a bit. Also gargle with salt Water and try and eat something that will scratch the back of your throat like toast or dry crackers. This really finally helped me, and it seemed to heal faster after I ate something kind of abrasive. good luck and I hope this helps.