did you ever find out what the problem was? I have had 3 utis in the past year and a half. Last week I started feeling like I had one so I went to the infirmary. There was absolutely no sign of infection, but there was slight amount of blood (not even enough to see). I went in for a follow up yesterday and the doc said not to worry because there is no infection at all. But i'm still feeling constant pressure like I need to pee! Please help! I hope you come back and see this....