Why can’t Josh sleep before the big game in the poem the (main reason I can’t sleep)

His brother is on the phone with a girl

The stubble on his head is so itchy on the pillow

He’s worried about the game

He’s worried about his dad

He's anxious about failing or not performing well

He's nervous about the pressure and expectations

He's restless and filled with adrenaline

He's replaying scenarios and strategies in his mind

He's overthinking and overanalyzing the game

He's concerned about letting his team down

He's unsure if he has prepared enough

He's thinking about the competition and the opposing team.