Been to long- Weight down- back spasms UP!!!!

Been a crazy a busy few weeks, trying to get some order with are bills and apply for job options. I have lost some weight 5 pounds. I could feel the weight loss in a positive and negative way- Problem with the weight is my back, with such a small weight loss I get a huge pain in low back- Such a pain it almost brings me to my knees at times. I have always had this issue since my weight has gotten so huge. My back has been weak over the years. I have a great memory of a few hits during football that I know have weaken the back, but I still blame myself. After all the weight it my fault. In the past I have used a muscle relaxer and after a few days been fine. Problem? Muscle relaxer knock me out cold- Which is fine being a single person or a married person with out a kid. Its a painfully hurdle to go though but its worth it getting me back down to a healthy weight.