First, you say you were on a fast, but you also say you were eating fruits and juices. So I would not be concerned too much. Hydrate your self, if anything do a Sea Salt flush, it will make you go and allow your body to hydrate. Hydaration does not only mean drinking enough water, it means you are getting enough water in your cells. After having fruits and fruit juices one should have good BMs.
If this continues, take Trifala before bed till you become regular. One should have three to four BMs a day.