I think more A time might help. 2 hours is appropriate for a 4 month old yk? Could you try for 3 hours and see? Just start fresh with a new A time. You will need to give it at least a week to see if this time is working as she might get OT in the process. FWIW, by 6 months, we were on 3.20 A --- some are doing more, some are doing less -- we need to figure out the perfect A for her, and you will know it's right when naps start lengthening. keep me posted