5 year old autistic DS takes forever to go to sleep at night and he’s getting worse. He seems physically exhausted but doesn’t fall to sleep until 10:30pm. Wakes around 7am but most nights is also awake in the night. Sometimes we find him downstairs watching tv in the middle of the night unless one of us hears him getting up. In a morning he is so tired and this affects his mood, his eating, everything. He has a solid bedtime routine, we’ve tried playing audiobooks etc but he just can’t nod off for ages (but looks and seems really really tired). I did bring all this up with his paediatrician during his autism assessment early this year and she refused to prescribe melatonin because she felt he got enough overall sleep but I really disagree. Can I buy melatonin online myself or is this too dangerous? Where would I get it from and what would be the correct dosage? Ive been reluctant to without having it prescribed but im not sure what else to do. He just can’t wind down.