I guess it could be but they would have identified it as such during the test at the doctors office of your urine. Even if they send you home, they usually will call in antibiotics for you if the sample they take tests positive for bacteria at any time after you took it (they normally test it a couple of times to see if the culture grows). The blood in the urine is scant but there and that is more concerning. Do you have any down low pain in your back? Kidneys are there and sometimes a kidney infection would ache there. Or hurt. UTI"s almost always have a very distinct pain with them. If you have ever had one, you know what I'm talking about. Upon elimination of the urine, it hurts really bad. And the urge to pee is not just at night but at all times. So, it doesn't sound like a UTI to me. But you should follow up with your doctor if they have detected blood in your urine. good luck