I have to ask - are you sure that it's the inside of your throat that hurts? Could it be your lymph nodes? As you can see in this picture - we have lots and lots of them in those areas:
www.britannica.com/science/lymph-nodeAnd, if it's your lymph nodes, it would indicate that not only is the treatment working in killing off the bacteria (lymphs filter out debris in the blood), but we have ways to help with the pain/fullness.