Great advice here. You need to get this poor baby to a vet and NOW!!! The symptoms you described are either coccidia or distemper. If it is distempter, you need to totally clean out the room she was in and disinfect it with Clorox bleach (not the cheap stuff as only Clorox will do). Distemper can stay airborne for up to one year (I know as I had a case of it in CT with 3 kittens I rescued). I will say loads of prayers for little Crush and light a candle.