Hello & welcome to HCM,
It might be UTI !!! Antibiotics once started should complete its course provided there is no reaction occurs. Any anaphylactic reactions occured should be immediate. Anyway, straightly answering, my personal decision to your question is -
(1) STOP the Augmentin
(2) Immediately get done an Urine culture/sensitivity and serum Creatinine
(3) Start antibiotics according to sensitivity report and with titration to S.Cretinine level.
Of course you need to get this done under a doctors consultation
Wishing an early recovery