I initially replied to hopinso's message on depression. But now Rachel has mentioned it as well. Rather than repeat myself at length, read my other one a few posts up. What's taking place is natural and beneficial, happening because on some level (most likely purely unconsciously) you're seeking more than what you were told.
Hang in there - y'all will be fine. Roll with it, feel it, honor it, and remember though it might feel like your world is ending and everything is hopeless, it's not. Stay with the diet and work with what it's bringing you - on ALL levels.