I Am Having Some Discomfort On My Left Side With

I am having some discomfort on my left side with some blood clots when I urinate. I have had tests in the past that doesn't show kidney stones and had one a couple weeks ago as well with no results. Blood results show nothing as well. The past couple weeks I have had some blood in my urine but only once or twice a day not all the time. I seem to urinate more in the evening and sometime have a 'rushed' feeling when I get up from sitting to get to the restroom very quickly. Thank you