This is probably totally off-base, but just in case it's not - my DD had a 504 for ADHD-I, and also clearly had anxiety (which she had some accommodations for). She'd also been diagnosed with dysgraphia, but that no longer seems like a great fit. In June, she was (finally) diagnosed with something that actually made sense to us all - autism. It's been difficult, of course, but also very freeing for us.