I certainly would have thyroid levels checked out, along with iron
levels, etc. Basically, a good
blood analysis looking at all factors.
You never really mentioned what the side effects were of the Concerta that was bothering you. You have gone from a mid range dose to the smallest dose. Maybe, you should try going another way to a higher dose - here again, I don't know what the side effects were. And, of course, you are taking a methylphenidate.