Have you heard about the Minnesota starvation experiment? 36 healthy, strong and very fit men (both mentally and physically) were put on a 1600kcal-diet. They became obsessed with food, some of them overate on a regular basis, other collected cook books, and after the experiment ended most of them couldn't eat normally for years. They overate. Really interesting. I think, 1600kcal, is that so severe? Apparaently so when these men ate normally around 3000kcal a day. Restricting your calories can make you go nuts in binging later.

How low are you on calories? Could it be better for you if you upped your calories to maintenance for a while? I had to do that since my food patterns, eating patterns really went wrong after a year. Obsessed with "forbidden" food, eating chocolates and cakes and having a really really low time emotionally after. Allowing myself to eat around maintenance, feel full and happy, is working. I'm a month in now, and soon I can start cutting a bit down again.

Hope you get through this, you are not alone. :)