Hello Doctor, Been having chills for the last 3 days that come and go primarily at night when sleeping. Have frequent urge to urinate but very little urine comes out. Had bloody urine two days ago but that has stopped. And , have had bloating where I can eat much less than I normally do at meals. Get full very rapidly after a few mouthfulls with little appetite. And lower back pains. I have in years prior kidney stones that passed, but not sure if this is the same symptoms. Additionally my energy levels are lower than normal . On the day of dark urine practically no energy at all. Thanks in advance for you knowledge.