Hello! My child is 2 years and 3 months old. For the last month, his …

Hello! My child is 2 years and 3 months old. For the last month, his sleep has worsened, he takes 2-3 hours to put him down, both day and night. We follow rituals before bedtime, I keep track of wake time. And all signs are there that he wants to sleep. On top of everything, he now needs light, even though there's a nightlight. But he runs around and turns on the light; and this moment before bed starts my fingers biting at what is it connected to?