I don't have any good answers, but just wanted to say that I have a child who is kind of ADHD/ASD...ish (also very oppositional) and she has these kind of weird up and down periods like you describe. I find it very puzzling, and it's been this way since she was quite little. Although specifics are different, I found myself relating on some gut level to you and what you wrote. Oddly enough, my other child, who does not have those concerns, also had a strange regression period last year that concerned us during a time when his health was a little wonky. Now all is fine. I'm not at all saying there's nothing here to look at, btw, just that I know the feelings you are experiencing and wanted to send you a virtual "I feel for you."
