i think you need to realize when you do something physical, your body is reacting with pain and stiffness. if you are slowly moving forward, 2 steps, then 1 back, or maybe 2 back some days, but still forward, however slow...its the time to give in with rest and peace of mind that this is your process and give yourself the time its going to take to heal to whatever level you attain.
all in all, it sounds like you just need to accept your process is slow but its still forward...
PPMS. Liberated Katowice, Poland
06/05/10 angioplasty RJV-re-stenodsed
26/08/10 stent RJV
28/12/10 follow-up ultrasound intimal hyperplasia