I Had Been Sick For Five Weeks I Am Better

I had been sick for five weeks I am better now after going to the dr I got an antibiotic and have been better for a week except towards the end of the day I get a sore throat and seems to be agrivated by drinking only water. I can eat, drink juice, but most of the day I drink a lot of water and by 7 pm I start getting a very sore throat