She would cry at night and she wanted one of us in there to rock her but it never did much. It seemed almost like there was an amount of time that had to pass before she could get back to sleep, usually 1.5-2 hrs. We tried everything, pain reliever, feeding her (even though she hadn't eaten at night since she was 4 mths), nothing helped at all. She did not suddenly switch to one nap, it was over the course of about 2 mths. Some days she would take a 2nd nap, some days not. It depended on when she woke up, if she woke later then she could stay up long enough to just have one nap. After a while she just would never take a 2nd one unless we happened to be in the car so I just stopped trying. By that point she had grown more into the longer A time, though she was stuck at 4 hrs A time forever it seems. I think it was just a matter of her growing and changing but it sure stunk at the time! I really hope nothing is wrong with him, I doubt there is but it is good to get everything checked.