You really need to go to the doctor to get treated with the right antibiotic. It is never a good idea to diagnose and treat yourself with old antibiotics that you had before, or someone elses!
For adult the first one is Zinnat (Cefuroxime Axetil ) 500mg Tablets twice daily with food, It will cover most common bacteria that infect tonsils: Staphylococcus aureus, Group A β-hemolytic streptococcus and Haemophilus influenzae. Beside that it is safe and well tolerated. The second one is Augmentin (amoxicillin and clavulanate) 1 gm Tablets twice daily with food, but usually will not cover Haemophilus influenzae bacteria. These antibiotics for normal healthy person i.e( not immunocompromised, penicillins allergic, diabetic or has kidney and liver problems)