low weight! Respect for what you are working at. You might be coming to the end of your reserves. Wait and see what happens with the developing sensations in the mouth and throat. If it is ther return of true hunger, you'll know-- that is, it won't be a maybe, and won't come and then go. (or so says all the lit)
White tongue is more a constipation (alimentary canal) issue than anything else, i think -- even when the body needs other kinds of cleansing/healing. Your bm experience would attest to that. I didn't have the white tongue on my 29 day fast, ever, and don't have it now. (day 7)
started with a salt water flush both times and have very regular bms, normally.