I have had blood in my urine three times, once from a serious UTI, the other two times from kidney stones. During the UTI, the blood was more cloudy and diluted. Urination was quite painful. During my kidney stone episodes, there was much more blood, I began passing blood clots, and I eventually I developed an excruciating pain in my side. Most likely, you just have a serious UTI, but there are other causes of blood in urine, so I think you need to get to a doctor, if possible. In the meantime...keep up the fluids, cranberry, etc.