I've heard it takes at least 21 days on the MC, if not more, to get your tongue back to pink.
10 days is a good start to a cleanse, but hey, you've probably got a lifetime of toxins in your body to flush out, and getting that accomplished in 10 days is pretty impossible.
You probably will continue to lose weight. Just remember to exercise too - your metabolism slows down on the cleanse, and the longer the cleanse, the more important it is to do things like exercise to ensure you don't immediately gain back that weight you lose once you start eating again. I've read posts that say many people gain back up to 1/2 the weight they lose once they start eating again. Now, that hasn't been my experience thus far, but I SIGNIFICANTLY changed my eating habits post cleanse. So even if you lose that additional weight you want....you're gonna have to work really hard to keep it off once you're off the cleanse.
I would suggest picking another date, like 21 days, but listening to your body .... if you think you need to end it before that 21 days is up, that is ok.