newly diagnosed ASD son doesnt accept diagnosis & is slowly withdrawing

He's 16 but doesn't think the Drs have got it right. Its my fault because of the info I gave the Drs apparently. won't read any books, doesn't want counselling and doesn't even want his younger sister to know.

he has established a good home routine during lockdown, but has had hardly any sort of conversation with anyone outside the family. He doesn't want to meet up or do video calls because they are "not normal " & he only wants to do things normally, ( i.e.pre lockdown conditions )on his own terms. ( sound familiar?!) emerges from his room for meals only.

i appreciate that this is a rough time for all teens, autistic or not, But I am getting concerned about him. any advice about either issue appreciated, thanks.