just sending
i have a teen with ASD, diagnosed when he was 10, so i know how hard it is.. i think the main difference is, i suspected ASD all along as i have family with it.
The main thing to do is breathe, find support groups, and the SEN board on here, there are also some good groups/pages on FB which i found a massive help when navigating this.
You need to do your research, both on autism, and the law, and what the school is legally obliged to provide to help him. Ask for their SEN policies, and find out about the 'local offer'. Contact your local Parent Partnership (sometimes called SENDIASS) for advice.
Talk to the Senco at school, get the ball rolling on applying for an EHCP, and get the support he needs in class.
My lad often refused, or he would play up to get suspended so he wouldn't have to go in.. if he went in he refused to work. It was simply that the sensory environment at the school was too much for him.
He now attends a specialist school for kids with Autism and no other LD's and he has barely missed a day.
The main thing for you to remember here, is you are your childs ones and only advocate, so you need to get tough about making sure he gets all the help and support that he needs to get through.
And no feeling guilty, home NEEDS to be their safe space.. you'd see DS at home and think 'normal teenager' because i have put a lot of work into our homelife, his bedroom and our routines to suit him and make him feel safe, secure, and loved... but if i take him out of this house (and he often refuses to even leave the house) its a WHOLE other ballgame, and i have to supervise him like a hawk to make sure he remains calm.
You've got this 