hi my name is Lauren. Iv recently tested positive for a urinary tract infection. its been exactly one week since I started having symptoms. two nights ago my lower back started hurting and throbbing very badly. its near the bottom of my ribs in my back where my kidneys are located. it hurts continuously and the pain level ranges on a scale of 1-10 it ranges from a 5-9, with tylenol at its lowest. I have been on an antiiotic for three days and still am having pain. the thing I don't underatandis I am drinking over 64oz of water daily and hardly going to the bathroom. today I drank 5, 16oz water bottles in a 4 hour span, and did not urinate once. when I do urinate, its golden yellow, and hardly any at all. I'm also very tired and have no energy whatsoever. please help me figure out what may be going on.