My daughter is almost 13 weeks old and we are having some challenges. A month ago I implemented the Four S's from Tracy's new book and the swaddling and shh pat worked like a charm. However, two weeks ago she started fussing more and more around nap time. I have gone back and forth on the swaddling and, after much consideration, decided not to do it anymore as she is finding her fingers, she cries more when swaddled, and she always gets out within five minutes. I recently started the PU/PD method with her and it is working okay. However, what I have noticed is that she is consistently waking up after 45 minutes from naps (at night she goes to bed at 7:00, DF at 11:00, and wakes up around 2 or 3 to eat, then sleeps till 7:00). Tracy's new book talks about transitioning to a four hour schedule during the fourth month and that a sign of this is the 45 minute naps. My question is, has anyone transitioned their child to a four hour schedule and, is it okay to do it even though she is just turning three months now? Also, is anyone else having any luck with the PU/PD? How long did it take before baby was able to transition to sleep more smoothly?