Just with anything the novelty wears off. She has come to realize that daycare is here to stay and she needs to grieve a bit and realize she can't change it - exactly what you are doing of not giving anything special just going about the normal day - and she should come around. Expect her protests to get a bit worse before they get better but by staying more or less hands off you are teaching her to look to herself (not mom) for security and contentment.