I had a microdiscectomy over 12 months ago. I have ddd at 3 levels and have suffered with cronic back pain for most of my adult life. the surgery for my herniated disc was successful but I am still suffering a lot, if not more with my previous lower back ache. I am still on a lot of meds, I attend physio therapy weekly and also attend pilates classes to build up my core strength. I seem to be at a point were I am not progressing. I have a mri scan booked for next week as my physio therapist believes I may suffer from spinal instability. I often have a slipping sensation around the level were I had my op and after this occurs I have pain that starts from deep inside my spine and radiates out and down to my hips, buttocks and legs. has anyone else had these problems or suffered from similar symptoms. also something that is bothering me is that sometimes my spine feels fine and everything feels in place but other times it feels like a verterbrea has slipped out of place but then almost seems to correct itself. I worry that maybe if I have the scan when everything feels ok that it may not show the true picture. does anyone know if slipping can happen but then can slip back into place. sorry for any errors or mistakes in this post. thanks in advance.