I'll share my experience with the hopes that you'll see some similarities:
A friend and I (on bikes) were gravely injured from a wrong-way driver, he more than I with massive head trauma. I only shattered my femur. When I crawled to him in the road and got a good look, I'll take the shattered femur any day of the week.
Helicopter flight, reconstructive surgery with rods, plates and screws, then sent home after a few, high as a kite on painkillers. I've never felt the need to write poetry before, but all my emotions were right there on the surface. Everything had to come out, for some reason with poetry- not that it was any good.
The opiates and their ilk seem to take some of the pain, but leave you with all the unfiltered emotional up and down rush of the pain. I had to get off them ASAP for my own sanity. I kept taking them to sleep, but couldn't take it during the day as the emotions were too much. The depression was overwhelming and bottomless. I ended up using marijuana during the day at the insistence of a friend who had experienced the same. I had never ever believed in it as any kind of medicine, but it worked so well that I have no doubt it kept me on this planet. Think what you will, but if I had continued to use the opiate based painkillers, it would have killed me.
Today, the femur is healed and riding a bit more cautiously, but that's not a bad thing.