Just wondering if anyone has had a sharp pain on left side of lower back about 4 weeks after Alif on the L5S1. I have had it for about a week and It will jolt me and stop me in my tracks. When it hits I can't move for a few seconds and it has been consistent for about a week. It feels like it comes from the left side of where my implant would be then radiates out. Has anyone experienced this or should I be worried? Thanks!