Why Do I Still Have Frequent Urination And Irritation For Over 7 Weeks?

For 7 weeks now I have had the feeling of needing to wee more often. Every now and then I have a iritation feeling inside. Iv had several urine samples done. Moat have come back with traces of red blood cells. I was given antibiotics a month ago . It went away for a week and then came back. Doctors keeping doing urine tests but won t give me any more medication. I feel like I will be like this forever