My daughter screamed, on average, 20 hours a day, for four months.
Forty-five minute increments were her regular stretches of sleep. My husband and I would high-five if we got an hour and a half stretch.
Our firstborn, Adrian, was born after a long, hard labor. Latching was a difficult process that took over a month to develop; I used a shield to help him to latch for feeding time for a month.