Thank you for posting your worry.
The tongue sore could still be as a result of the strep infection (scarlet fever
). So you probably having oropharyngitis due to strep. The penicillin taken will also be able to resolve the tongue sore. There are other possible differentials of the tongue sore like vitamin b12
and folic acid deficiency
, oral thrush
), cold sore (oral herpes) etc. An oral exams will need to be done by your doctor to be able to exclude the different causes. You can use mouth wash solutions like hextril in order to take care of the oral affection due to the bacteria. Antiinflammatory will be very helpful here.
Hope this helps