Hi I am a 46 year old female and have had a uti infection for 7 weeks. I have been on macrbid 3 times, sypro 3 times and amoxicilian once. Every time I finish the course of antibiotics I get retested, the doctor tells me that it is still there. He has cultured the urine twice and the culture comes back negative to any bacteria. I still have symptoms of lower abdominal pain( not as bad now) and i still deal a with a lot of nasea. I dont have any problems peeing, as a matter of fact i am not thirsty and i do not have the urge to go to the bathroom. In a day I may go 3 or 4 times and that is it. Can you give any suggestions as to what this might be or what my next step should be?