When my younger son gave up naps at 2 I was so distressed! I needed nap time even if he didn't. I instituted "movie nap" and we put on a dvd (curious george type stuff) on after lunch and he lay on a blanket and rested for the length of the dvd. At least then his body got some rest. Because even if they don't sleep, children need that rest time.

I can't imagine keeping up with a 3 year old with CRPS. I know that I would look at ways to keep her confined to manageable spaces at home with many of her fave activities in that area. Also work on teaching her about how mommy hurts (you probably already have) so she can learn to be careful of your body. 3 year olds can begin to learn some empathy, and to be helpful. She will be proud if she can be your helper and bring you something (i.e. get mommy her keys off the floor).
I certainly hate asking for help, and don't get enough help from family either.