I bent over to reach for something this morning and felt a twinge in my back. I have a herniated disk. the pain is going down my left leg and all across my lower back, my twinges in the front of my thighs as well. I went to urgent care and was given a muscle relaxer but after a few hours it doesn't seem to be helping. I was told it was back spasm, should muscle relaxer be helping if that is what it is?