You can sort your legs out. There are simple massage techniques Hann that you can do yourself which work amazingly well. Its surprising what a difference it makes.
Also before your Crit, keep your legs raised the night before and no excess walking.
You never see a Pro walking about
And before anyone edits the keeep your legs rasied quote im deadly serious.
The rest and recovery side of cycling is as important as the training.
Good luck