i really have no way of offering you a patient-specific answer since i cannot review your medical records or examine you. there is a possibility that you did not have a bacteria that would be susceptible to penicillin. you may have a viral infection. prolonged sore throats can even be mononucleosis (mono) or due to the post nasal drainage associated with a sinus infection. it would be best to see your medical provider again for a reassessment. this is really the only way to know what may be causing your continuing symptoms.
ive been horse & had a sore throat for about 3 weeks after eating im not as horse and my throat doesnt hurt as bad why. about a week ago the driving prescribed me penicillin and told me to gargle with salt water the only time it seems to loosen my through and able to talk is after i eat its not a 100% but at least people can hear me hoping you have an answer