I had an L5/S1 microdiscectomy 1wk 3days ago. Surgical pain was great 4 days post op, but lessened significantly by day 5. I had a large frre fragment removed that had been sitting on the s1 nerve giving me back pain and foot numbness. After surgery the numbness remainef. I started walking regularly after day 4. Today I sat on the couch and felt very significant pain in my lower back, the sharp take ur breathe away pain. I went to lay down and heard something and felt a pop in my back. Im in a lot of pain.... I'm scared I rehernaited, could this just be post op pain? I did not bend or twist or lift anything.