Oh please please please someone tell me sleep regressions don't last!! My baby, who is 5.5 months old, and has slept twelve hours a night since she was three weeks old. But for the past couple weeks she has started waking up at least twice a night, sometimes every two hours. At first, I thought it was her just trying to adapt to a new environment (we moved around the time this started). But it feels like this is the new norm!!!  We cosleep so it's helped a little in that she doesn't have to really wake up much to nurse back to sleep. But sometimes (like right now) she's up for good and next to me babbling away.