Hello, I was diagnosed with having a UTI which my doctor said was very stubborn because I had about a count of 1,000,000 of a bacterial infection. I was on Cipro for 5 days but felt no improvement, so he switched me to bactrim ds 800 mh twice a day for 7 days. There is no burning or pain yet I still feel a tingly sensation in urethra after I urinate and it lingers all day. Im on my 6th day of the bactrim. Is this normal? Do I need more time on the antibiotic? Could the urgency/tingly feeling be caused by something else. Been in a monogamous relationship for 7 y years and have done a full test for STDs all negative.