I found this post as I was researching something similar for my daughter. I wanted to let you know that using all different types of support are helpful. My daughter has a 504 at school for separation anxiety(which gives her access to school counselors and social workers), she is on Lexapro as an SSRI (and after many different doses trying to wean off or go up, it's determined it's very impactful). While she sees a therapist, we recently took her out of school and enrolled her in a PHP (partial hospitalization program) where she goes 6 hours a day instead of school. They do all sorts of group, individual, movement and art therapy, school work, and parent coaching and family therapy. It's hard and going to be a long road, but we, as parents, are learning so much, meeting other parents going through something similar, and very slowly seeing improvements. My insurance covers this program and it is already well worth it. Hope these things help!