It sounds like she may be ready for an increase in A time. Most 3 month olds start working towards the 4hr EASY, so their A time increases to about 1.5hrs. Around 4 months old then, many can transition to the 2hr A time with 2 X 1.5/2hr naps and a 30/45min catnap. Many times the unsettled sleep in the wee morning hours indicate more A time needed during the day.