My 2.5yrold has started waking earlier and earlier everyday for the last 3 weeks. He woke this morning at 4.07am. He is happy to cuddle in bed for about 45mins but then wants to get up as is hungry. He doesn't always have a nap in the day - maybe 5 days a week. Sleeps for about an hour at 1. Is ready for bed at 7/7.30pm. For the last yr has slept for 11 hrs. Eats well. Started a nursery 3 days a week a month ago and his brother arrived in March. Could this be throwing him off? Help needed! Thanks