All of my broodies (bantam cochins) get very pale at about the 2 week Mark as well. Their combs go pale and shrink back down to pullet size. Then after they break from being broody, they get their red, big girl combs back in about 2 weeks.
Unless she is showing other signs of being sick, I wouldn't worry. That said, if your not going to give her eggs to hatch (might be a bit too late for that now through), I would break her from being broody.
The way I like to break broodies is to place them in a wire bottom cage with nothing but food and water and hang the cage about a foot off of the ground. This will usually break then in 3 days or less.
Good luck with your beautiful girl.
David