OK, so my 17 year old girlfriend and I have had sex with condoms that didn't break (I checked) probably 4-5 times since she got off her last period June 6. Recently, around June 18 or so, she had been experiencing the need to urinate often, but would usually not actually have much urine, and claims there was some kind of blood consistent with spotting accompanying the frequent urination. After about a day or two the symptoms went away. She went to the doctors today and apparently through a urine test they determined she had a urinary tract infection that had simply healed itself, but I am not convinced completely because I'm unsure whether they test for just blood (which could be from spotting), or if they test for blood and bacteria. She hadn't mentioned the spotting to the doctors either. I'm curious if the blood discharge is related to the possible infection, or if there's a possibility she's pregnant.