I agree with puffin; but also, I suggest dropping the melatonin (tapering it perhaps, rather than stopping at once, if you've been giving it daily). I know it's regarded in some places as utterly benign, but in others it's not available at all or never recommended for children - given that you're seeing issues that might be caused by, rather than ameliorated by, it, I'd get it out of the equation asap.

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