Suggest Treatment For UTI

Yes,thank you. I believe I have a Urinary tract inf. My symptoms are burning and a terrible odor I just had a urine sample taken and it shows no infection, I ve had this before and my gynecologist nor my doctor could not find out where the odor was coming from both a pelvic exam and a urinalysis we re done. This lasted 3 months last time I had this. Its so terrible I do not want to be around anyone. Can you help?