I always have light-colored stools for the first few days after a flush. They look like those of a baby, which indicates a successful cleanse to me!
I think your heavy meal may have done you in. Your appetite may have decreased to rest a digestive tract tired from all the activity. I recommend you drink plenty of low-acid fluids, get adequate rest, and eat small balanced meals each with small amounts of healthy fat, protein, and complex carbohydrate; I bet you'll feel fine in 2 days or less. You might also try an electrolyte replacement, maybe your fluids depleted too rapidly. Let us know how you are doing.