yep, a shorter A time, a 30-40min nap is an OT nap, try putting him down earlier (hard I know when its already so short) try a longer wind down perhaps as well. we were struggling with naps until I took L to his room at 40mins A time, did a 10min wind down and put him into bed then he took 10mins to fall asleep, total A time was 1hour and still is at 12 weeks old