Fighting a disease, being in pain AND keeping up the strength for breaking old habits takes a LOT of character and strong personality; so, @lauralemons : BIG CHEERS TO YOU!!!!
I know it's often taken for granted that people change life-styles/habits when that's what's needed to get better, but I also know it sometimes takes a real good focus on 'the prize' at times you just want 'a little slip back to the old habits' .
Keep it up, and wishing you lots of positive energy!