Nina's arsenic hour was from 4pm till 9pm every day for about 8 weeks!!! I used to just sit on the lounge and let her feed, cry, try and comfort her, she'd hate that, so I'd feed again, she'd cry again, she might have a sleep, then wake up and cry. It was awful, but we hang in there and at around 10 weeks old she was in a great routine of going to bed at 6pm. She didn't sleep through, but at least the routine was there