Hello
so sorry to hear what is happening. People with ADHD may get hyper, but from what you are describing, this appears to be something very different.
Has the child been to a developmental pediatrician? Primary care doctors really are not the best for something that seems this intricate imo.
Have you ever looked into possible PANDAS/PANS? where strep (and sometimes other) infection can set of a severe inflammatory reaction in the brain, leading to what appears to be almost psychotic behavior.
Here is a website that explains it
http://www.pandasnetwork.org