I was very very surprised that the pain after my c-section was no-where near as bad as I imagined it would be. I had never had major abdominal surgery before my c section and I imagined mydelf being a big sook and not being able to stand up straight etc etc. My c-section was under a general so when I woke up after the OP there was no spinal/epi there to keep the pain away but I felt no pain anyway. I didn't have a morphine drip after the surgery. The pain relief I did have were voltaren suppositories (doesn't sound nice I know but they were fantastic) and capadex tabs.
Don't get me wrong, it wasn't a walk in the park but I just had a little discomfort every now and then. Especially if I overdid it. The day after surgery I got up and showered and I never looked back. I made sure I pretty much stayed up from then on and did everything myself. I believe this really helped my recoverey.
So my advice would be to stay on top of your pain relief (perhaps explore other pain relief options (especially seeing as morphine does't agree with you), and get up and moving about as soon as you can. The longer you stay in bed the stiffer and sorer you'll get.