Hello. I am a grade 2-3 spondylolisthesis L5-S1. I've been putting off my 360 fusion for work reason (and I'm scared to death) I've had pain but it's been manageable as long as I don't exert myself. Last night I went to get off the couch and my knees gave out from a combination of weakness and pain. I had to crawl to the bathroom and into bed. This morning is the same, crawling. My doctor/surgeon is out of town for Thanksgiving weekend. I don't know if I should go to the E.R. because i don't know if there's anything they can do for me. Has anyone else had this and if so did you go to the hospital or just try to tough it out?