Hi, Since you have already been under treatment with Penicillin, there is some relief and one tonsil has regressed you can surely wait. Anti-inflammatory medicine like Ibuprofen. Povidone iodine gargles. PPI like Pantoprazole as acidity increased in such cases. May be an additional or change over to another antibiotic like Amoxycillin if required. Surely you to have a review with the doctors so that clinical evaluation and further additional management will help to have proper recovery and cure. Take care. Hope I have answered your question. Let me know if I can assist you further. Regards, Dr. T. Chandrakant, General Surgeon