There Is Blood In My Urine, Sometimes Cola Colored....no Fever,chills,pain,high

There is blood in my urine, sometimes cola colored....no fever,chills,pain,high blood pressure,no bacteria(had that checked) getting a cat scan tomorrow little nervous it's cancer. Can something else cause this besides a tumor? Saw a urologist and he ordered blood test Can stones get stuck in you kidney (have had them before that painfully passed) causing bleeding and odor?