So for the first 6 months baby slept in my bed and then we transitioned to the crib. He does okay falling asleep at about 7pm but then at 3am - 4am every morning he wakes up screaming crying. We've tried leaving him all night which we did for about a week and he eventually fell back asleep but not til like two hours later! He already has 8 teeth and we didn't really have any problems with that. I just don't know what's going on. Help