Hello OP
I always pop up on these threads, just to tell people, they are not alone, there are thousands of us in the same boat (or have been, we are thankfully out the other side).
Firstly, let me direct you here: https://notfineinschool.co.uk/
It’s a place filled with help, support and resources. There is also a FB group, so come and join us!
Secondly - it is the responsibility of the LA and the School, for your child to get an education. This is not on you, they are the professionals, and they need to do their job. Do not withdraw your child from school, as they will drop this responsibility like a hot brick.
On EHCP .. if school won’t apply for one, do it yourself, directly with the LA. Your child’s disabilty is impacting their ability to access an Education. Please don’t fall for “bit they are working at the right level” or “they are ok when they are in school”.
Lots of schools are not able to cope with young people with EBSA. We were the same. ASD girl, wheels started to drop off in Y8, didn’t really attended at all in Y10 & Y11. With CAMHS for 3 years, eventually diagnosed at 17… but started on Sertraline at 16, which was a complete game changer. DDs school was really supportive, and have now completly changed how they manage people like my Daughter … and all for the better.
Please don’t make it into a battle, it’s not your job to force her in - that will make the whole thing worse. You are her cheerleader.
DH found it really difficult - turns out he’s ASD as well! They get on great now, and never said anything bad to her, but I knew he was fustrated.
These dark days will pass. Exams, GCSEs etc, can be done at any stage in life. DD is 19 now, in college doing something she loves, a lovely person, great company.. who cares what that she missed most of high school, a scraped a few GCSEs.
There is a SN board by the way .. full of helpful tips