I ended up overdoing the hard work in the garden after having an inspection pulled on me at about day ten on one of my earlier fasts last year. I tend to let everything grow over until I get the inspection notice and a week or so is usually plenty of time for me to get out there and fix it all up- along with all the bath and shower scrubbing etc inside. Copping it during a fasting crisis though was too much for me and left me completely ennervated and needing to break the fast by day 14. I would have just slept for a few days if I didn't have my kids to look after but it happens.
The body has amazing strength even while fasting. The important thing is to do as you're doing and give yourself as much rest as you need between attempts.