It strikes a cord with me. Definitely. My daughter had a month where she alternated between a catatonic-like state and being feral. It was so bad, we didn't leave the house. She stopped talking, eating, bathing. She would cry over everything and nothing. IVIG brought her out of it. Afterward, she seemed weak and almost infantile like. If we went anywhere, I had to push her in a stroller. She was 7 at the time. She also drew a clock like Susannah. Immunomodulating treatments (IVIG and steroids) definitely help her, but they never last.
Pow Pow, if I want to rule this out, what should I do? Call Duke? I've already implored our local neuro. We'll see if I get anywhere with that.