Hi. My story is pretty simple one. I had spinal fusion 12 years ago (L5-S1). Back has never been fully better, but it's better than it was. Lately, including today, my back will out of nowhere just give out. I'll literally be on the ground. It will keep doing this until i take tylenol/advil etc. and then rest. then it's fine. It's crazy, embarrassing, and honestly, painful. I'm going to go back and see a doctor but does anyone have similar problems? What works? Thoughts on why it's happening (nerve?). Thanks!