D.B.
I know my 4 year old has to have a night time routine or this happens with him too. It takes a good thirty minutes to wind down for him so we have brush teeth time, story time, time to pick clothes for the next day and prayer time. He still lays and talks himself to sleep. This is how he soothes himself I think. He is asleep much quicker. We have also come to limit snacks and juice in the close to bedtime hours. You may do this already, if not I hope it helps!