Hi,
I had a related question. My lo is 3mo old and is having similar sleep issues. He is a BF baby and has been on EASY since birth. His naps are about 1 hour and I can't seem to extend them. With two other little ones I'm feeling a little stressed. Our house has a lot of windows and in the bedroom they wrap around the corner of the house. I have tacked up blankets over the blinds to make it as dark as I can. But his unpredictable day sleep is starting to affect his night sleep which has always been good (one waking around 3). P/S has not been successful at all but if I understand you correctly he is too young for PU/PD. He sucks on his fist during wake time, but can't handle to have one arm left out. How long do you continue to swaddle?