So I was doing just fine up until last night. Thursday I was prescribed Percocet (5/325 mg) every 6 hours for pain from the ER. I took one at 6pm, then at 7pm took my Rebif shot. I took another one at 10pm, I was ok then, and I finally went to bed around 11pm. I laid in bed, and just could not go to sleep at all. Finally at 2am, I took another one. By 4am, I had started to have pain around my waist again, and shortly after that I went to sleep. I just woke up and I'm in bad pain around my waist. Did the medicine do this? Or is it just the MS?