He has an appointment this week with a therapist. We’re hoping to get some help. His behavior sounds identical to your son. It is hard. He is extremely smart, excels in school and has great behavior there, but at home he has meltdowns and screams at us and his siblings a lot of the day. He has always had sensory issues and one of the things he does is he sucks on the necks of his shirts. Being stuck at home a lot more over the past few months has definitely made things worse.