don't trust the 'experts'. Rule number 1. Do not feel that you have to trust them, or defer to them, or that they know more than you do.
If I had a pound for every time the 'experts' had been wrong, then I would be a wealthy woman.
So far, the 'experts' have been wrong about my first birth going to be no problem (I said it felt like he was too big and 'grating' in my pelvis), they can't get stuck, my feet are a size 6 so there will be no problem - my son got stuck and we both nearly died and he was left with erbs palsy.
My eldest would never have any form of independent life ( both my kids have autism) - he's now on his way to mainstream secondary and will likely as an adult have his own flat.
My youngest is 'in proportion' and there's nothing wrong with him - turned out he cannot absorb iron properly and was severely anaemic.
To pick a few at random.
So don't you start thinking that 'experts' deserve some sort of deference, or that their word cannot be challenged or that they cannot be told they are wrong.
You know your child. They read books.
I have a very low opinion of 'experts'. Very low.
If your daughter has a problem with language, then she is going to struggle with tests because of the language! You would think that 'experts' would understand this and take it into account and know how to compensate for it and how to test a child with language problems. In my experience, this is not always the case.
Trust yourself. Keep searching. Keep challenging them.