1 week post op spinal fusion and disc replacment

One week ago, I had disc replacement with donor bone between L2 and L3, and also between L3 and L4. I have a cage and screws holding everything together. My surgery lasted about 4 1/2 hours. I had my surgery on Friday morning, went home on Sunday afternoon. I have experienced some pain that was bad at times, then other time, nothing. I am on percocet, and just today started pregnosone. Most of the pain I am now experiencing is due to muscles on my back on either side of incision, and sciatic in the hip. I am not surprised, I due know all the trauma that nerves go thru with this surgery, and the way I now move to protect my incision causes some discomfort to my back muscles.
I am on a bone stimulator 2 hours every day to help the bone fuse. Overall, I am doing great. I have joined this site to see if what I am feeling is normal, and to help anyone else if I can. I have this surgery due to 20 years of lower back pain, and slight scoliosis. When my back went out this time, it lasted four months and after mri, saw that their was no more disk, and vertibre was on top of vertibre, squashing my nerves. Right now, I feel I made the right decision.