Experienced moms, who went through a year of crisis, REMEMBER! The dau…

Experienced moms, who went through a year of crisis, REMEMBER! The daughter changed very much in a week. She cries without any reason. For example: a toy fell from her hands, she didn't hold the spoon correctly, she didn't open the right page in the book, socks weren't taken off completely. Bathing and changing clothes end with tantrums. She is very calm and cheerful girl, but for some reason she started behaving like this. Question: How should I behave, run to her every little thing or let her cry and come to herself?