My 5 year old has started behaving really strangely in the evenings. She seems fine and like her normal self in the morning and daytime, but at 5pm she starts crying and complaining of a stomach ache, sore throat and headache. She won't let me out of her sight and clings to me like she's a baby again. It's like she's turned into a completely different child. Does it sound like she's ill or is something else going on? Has anyone else experienced anything similar? Thanks