In bed on time and awake for an hour: sometimes it is tomorrow, not the routine

An hour of lying awake, stomach aches or headaches with no fever, all of it worse on Sunday evening - that pattern is anxiety, not a schedule problem.

"Don't think about it" does nothing. Emptying the head before bed does: a short talk at dinner, a list for tomorrow, the school bag packed. Keep the bedroom for sleeping, not for sorting out problems. More than a month of it, or refusing to go to school - see a psychologist.