Hi i'm trying to figure out why ds2 (22 weeks) is waking up at 2am and not resettling until 4am. he was sleeping thro fine, but has been doing this since i introduced breakfast. do you think he may have tummy ache? he only has small portions, about 2 ice cubes of breakfast, lunch and tea, with a bit of fruit for dessert. could i be feeding him too much?