The head couldn’t have spoken to you openly with your child present.
Sometimes children need this kind of spontaneous approach to get over anticipatory anxiety. Sometimes this approach makes anxiety worse, as children will then worry even more about what might unexpectedly happen. It really does depend on the child.
You say you’ve had support from the SENCO. Is your DD on a diagnostic pathway?
I have two autistic DC who were at school until Y5. DS in special school, DD struggling in in mainstream. COVID lockdown showed me how much happier they were at home and what a better way it was for them to learn.
We’ve home educated since 2020. The difference in my DC has been overwhelming. They don’t use all their energy trying to cope with school so they have much more capacity for active learning. Anxiety levels have plummeted. My DS used to cry every Sunday night and at the end of school holidays. I used to feel sick having to take him into school because I knew he’d by crying, clinging to me, and begging me not to leave him. I thought I was doing what was best for him but when I look back now I can see I should have pulled him out sooner. My DD has blossomed too.
You can put your DD back into school later if you want. Home educating doesn’t have to be forever. We are part of a really active home education network locally and there’s a real mix. We have kids who have never been to school and never will, kids who tried school but struggled, and kids who were at home until they were teens and then rejoined school.
Schools are great, I was a school governor so I’m a great believer in what they can offer. But classes are big and teachers have limited support so if your child thrives in a different type of environment or learns better in a different type of way, schools can only offer limited support.
Knowing what I know now, I’d say deregister and home educate. Your DD is still so little. Take time out and re-evaluate where you are in 1-2 years time.