How long have you been gluten-free? When I first went gluten-free I could not eat any leafy greens at all. They went right through me, as did quite a few other foods. If you're still healing just about anything might set you off.
And as for the insomnia, I had had it all my life, but shortly after going gluten-free it was gone. I now sleep like a baby, and while all of my other symptoms are annoying to miserable, getting rid of the insomnia is the very BEST thing that has happened to me re the gluten-free diet.