Okay, possible tmi but here goes. I use the depo injection and get heavy bleeding. However, twice in the last fortnight I am certain that I have had blood coming from my urinary tract. Ive been tested for a uti but it was negative. My gp has given me some more abs and is repeating the test. However, both she and another doctor don't believe me when I say it's urinary bleeding and they are sure it's vaginal, and now I'm beginning to doubt myself. How can I tell?