About 2 weeks ago I went to the ER because I was suffereing from really bad head aches and light headedness. They saw that my pulse was raising when I stood up. My back was hurting as well which at the time i though was just back pain. They gave me all different types of blood tests to check for clots and other things and everything came back normal. About a week later my lower left back started hurting again on the sides. It was an achey pain that isn't too severe and hurts when I move mostly. About 2 days after that happened the area where my bladder is located began hurting and it seemed like I was going to the bathroom more then usualy and when I was done It felt like I still had to go. I was wondering if the blood tests I had taken would've shown any type of kidney problem I was having. I'm not to sure exactly what they were checking but they took like 5-6 tubes of blood. I dont have any other symptoms other then the back pain and strange urination patterns.