Last year I had the same trouble; change the clocks back an hour, and I am totally disoriented for weeks, as to day and night. Im fighting sleep from 9PM on, knowing if I do give in I'll be awake and staring at 4 the next morning, which is what happened today.
Food I can deal with, since I can eat at almost any hour, with no real problems. But the dark this early seems to make the evening slope along like a kid who doesnt want to come in yet at sunset. The hours from 7-9 at night are endless.
I just wish they'd leave it all alone, put us on summer time and be done with it.