pain everywhere

I started recieving pain in my lower back about 3 months ago, and thought I had pulled a muscle or something playing sports, I took it easy and took muscle relaxers and Naprosen, pain still didnt go away, then I had pain starting in my right lymph node area, and thought I slpet on it weird, so I did the same thing for my neck as for my back. Still sore, so I took it easy for a while, did nothing, I was going to bed around 10 pm, and could only wake up at about 1:30 pm. So now its Friday October 9th, I was checked out by my family Dr. on monday. They suspected a kidney infection due to my back and lymph node pain, and I had told them right when my back pain was occuring and still is, I started to have this pain in my right side of my stomach one early morning, and was nauseated, and after everything came up it was blood. A week after that, I was urinating neon green for three days, i monitered what i was eating and drinking, nothing was put together. I just drank and drank water, then it stopped. So I was put on Bactrum for my "kidney infection". I went to the ER last night because my back pain was excrutiating and my body hurts all over the place, I'm not getting better and I had to do a urine test, blood test, and x-ray. Everything came back NORMAL!??? I'm so confused as to why I am having this pain and not getting any better, I can't even eat anymore. I don't know what to do?