I need help with my 4 year old girl!!!?

She is trying to act like the parent and do and say things just as me and my husband do. She cries all day if she doesn't get her way and she will not go to sleep willingly (she doesn't take anymore naps, so that's not the case of her not going to sleep.) I don't know what to do!! I am losing my patience and she is driving us crazy!!! Any advice would be greatly appreciated. Thank you.