Having a Crabby Day?

I don't know what is going on, but my kids are crazy crabby. Screaming and constant arguing. I thnk it is the before school nutty behavior. It is making me feel overwhelmed and wanting to get back to the structure we all sometimes need. When we get there, we will be crying to come back to the sweetness of these summer days! It happens every time. Why is it that we want what we can't have?