Hello. I just got back from the Doctor and found out that I have UTI, Urinary Tract Infection. I'm 19 years old and have never been sexually active before which I heard was a risk factor. She concluded I had it when I told her I was having lower stomach pressure, not pain just pressure, and frequent trips to the bathroom even when I really do not have to go, I just feel like I do. I'm just wondering how I might have gotten this? I know 50 percent of woman get it at some point in their life I'm just kind of curious. I thought I was just having stress issues, but now I'm kind of stressed even more haha.