Oh that's terrible!! I don't know what kind of tub it is, but if it's leaking, you either have a bad seal around the drain and connecting pipes, or there is a crack in the tub that you can't see. Either way, it should be a fairly easy fix - a few days at most, and if you're lucky, you get a brand new bath tub, too!
That doesn't mean it's not a total pain in the kiester. Plus, hello!! you got yanked out of the tub just when you were getting comfy! So unfair!!!