Hi, I'm looking for some advice. We can't get our 3 mo old to sleep at night. She needs to be carried in the baby sling for 30-40 min before falling asleep every time and keeps waking up at night. She will sleep from 4 am to 12 at noon waking up once to feed. For every other nap we need to carry her in the baby carrier. Anyone have this problem? Any advice?