i have been having these pains for about 2 weeks now on and off until this morning it started and lasted all day gradually getting worse. i called my ob and told them what i was experiencing and they had me go to the lab for a urine sample. they said that they will have the results tommorow if i have a bladder infection. the pain on my lower back on the right side is now severely painful, and my abdomen is painful also. i had a spot of blood when i went pee earlier and now feel like im getting a fever. what could this be?