My son has a stomach bug was sick 3 times yesterday mainly his morning milk and then his snack. So he didn't eat anything yesterday from 11am onwards. He had several really bad nappies from about 2pm yesterday and then slept from 8:45pm last night until 6:45 this morn. He woke up and didn't want to be put down. Went back to sleep until 10:15. He has had atleast a beaker of water this morning had one beaker yesterday afternoon and has had a banana to eat about half hour ago. He is now back asleep on me. Is this normal for a bug, should i be concerned the amount he is sleeping?