I'm not sure if this is normal... I had si joint fusion surgery back in December. It's been about 8 weeks. I've been doing my best (per doctors instructions) to bend with knees, not to lift over 20lbs etc. Within the last couple of weeks, I'm experiencing back problems - muscle related. Some spasms and discomfort when sleeping. before the surgery, I had 'episodes' where my lower back would go (something happens and everything goes into overdrive to recover). It was said that the SI joint fusion was the solution. I'm super nervous that I'll have those episodes and the back spasms scare me. I suspect that I'm using muscles to compensate for different movement during recovery. Lots of information suggests recovery is weeks. Well, i know that's not my case. My dr says the healing can take up to 6mths. I'm scared that I've done something wrong because of the pain. Hoping this is not uncommon, especially the muscle pain and spasm.