oh man that sucks, i work shift work myself and it can be very hard to get into a steady routine. especially if ur dieting.
for midnights i never found my appaetite to be any diff. the first shift is bad then once ur sleep pattern gets flipped to midnight mode its easier.
force urself to eat every 2-3 hours like u do. when u wake up have ur normal breakfast and all as if u were getting up at 9 but only now ur morning is like 4 pm.
duno if that helps u any, hope it does.