I was given antibiotics (Keflex) for a severe bladder infection that just started to go to my right kidney. I started the antibiotics about 10 days ago and have about 3 days left. I have taken 33 pills and have 9 left and don't worry I plan to finish them completely. Almost immediately after I started taking the antibiotics the severe pain subsided and I have been getting better (apart from the side effects of the pills). But a couple days ago I started getting very mild hardly noticeable burning after urinating again, and very mild urgency again with frequently peeing small amounts. Hardly worth mentioning but I am paying close attention to my body these days and am wondering why these symptoms are re-appearing even while I am on the antibiotics. Any ideas? Thanks!