I can relate. I'm gluten sensitve.
If I eat an entire bagel, I can fall asleep if I sit down.
I can't eat Rye Toast at all. It makes me exhausted; almost sickly.
I'm weak willed (I suppose) and can't fully follow the diet/program fully...but I don't eat bread anymore and very rarely eat pasta. When I do eat pasta, I eat a tiny amount of the whole wheat kind.
I'm glad I read this thread. It makes perfect sense that if we are going to try eating a little of these foods, to eat them at dinner or bedtime only.