Hi, Barbara. Lots if ideas but not enough info to give you a direction. What state are you in? What are your current temperatures and what were they before you noticed the creaking? Do you have air conditioning or just open windows?
This may seem unimportant but creaking floors can sometimes be traced to a big change in humidity that triggered changes in the wood in your house.
By the way, ALL CAPITALS is considered yelling on the internet and many people do not respond when they are yelled at. If your kid is like most kids, they don't respond whether they are asked nicely or when they are yelled at but the boards are different. Most people here will respond if they know the answer but some will not respond to the yelling.