Hi, long story short, I had a disk removal and ALIF done at L5 and S1 about 6 weeks ago. Went great! Got all my feeling back in my legs and could walk. After thanksgiving, I squated down to get my shoes and fell backwards, jarring my back. It hurt, called doc, he said pulled muscle. Last week he sent me back to work, light duty for 2 hrs, but between kids and driving to n from, I was up a total of 8 hrs, between sitting and standing. Since then my back is horrible! The pain is right in the vertebrae. Walking feels like someone is hitting my low spine with a hammer. I feel like I did when first waking up in hospital after surgery. Can anyone tell me if it sounds like a loose/broken screw? I keep calling doc and he still says pulled muscles? Any ideas?