You have done amazing, congratulations. Everyone slips up at some point, it's just a matter of getting back on track. I have two boys 3 and 7 -- we play simon says when it's cold out, running in place and even an adjusted game of tag in the house just to keep busy and get some sort of exercise. Do you have an exercise ball, I use mine alot and brings the kids big balls in from outside to let them participate. God knows everyone could use some exercise in the winter!! Even your daughter can bounce up and down a little on it, right?
I'm sure you will find lots of support on here, there are some amazing people (you are one of them, you've worked very hard).