HI to all! My name is Joseph, and I was involved in a car crash with a tractor trailer approximately 2 years 2 months ago. In this accident I recieved several traumatic injuries. The most serious being a ruptured spleen, and fractured spine, (L3,L4). Thankfully the spleen stopped bleeding on it,s own after 4 days, wich the doctors then proceeded with the surgery on my spine. I had L3, L4, AND L5 fused together with a bone graft from my back hip bone and 6 pedicle screws with 2 titanium bars.The incision was to be originally 4 or 5 inches, but due to more internal damagethat was found once cut open , the incision ended up being exactly 12 inches. What I want to ask is about 6 months after the surgery I started sitting up on my couch rather than laying down all the time due to pain. This is when I noticed that after about 15,or 20 minutes of sitting I get a very strong pain on my tail bone as if I got hit really hard there.I also noticed that as time passed, I now get this pain within a few minutes of sitting.I also noticed that it's not just the tail bone but the bones on either side of it. I also have been getting like a pain and pulling in my left buttocks mostly and somewhat on the right buttocks as well.that radiates to the back of my left thigh then to behind the knee. I also have intense pain in my lower back on both sides where the fusion was done. By the way, I can feel the heads of the screws just under my skin, is this normal. I also wanted to ask if the hardware they put is permanent or do I need to go for surgery again in 5,10 years again to replace or adjust the hardware that's there now. By the way I still need a walker when I go out of the house but I get by with a cane in the house or if I go Within a couple of hundred meters.