Hello! It appears to to be acute tonsillitis
which may be bacterial or viral. I will advise to change the antibiotic to combination of amoxycillin
and clavulanic acid
. Do mouth gargles with betadine and continue with ibuprofen
I hope I have answered your query and this will help you. If you have any further query I will be happy to answer that too. Remain in touch and get-well soon.