I am taking antibiotics for UTI, which I have had since this past Friday night. Since then it has kept me up pretty much all night given the frequency which I need to urinate. I am exhausted given the poor night sleep I have now had for 5 nights. My question is how much longer until the medicines will cure my UTI. I only had this once before, and by the end of the second day I was feeling much better. This time, not so.