My 5wk old was falling asleep after the first 5 mins on the boob, today he has started to scream after the first 5 mins! Gave in after an hour of screaming today, he only took 20 mins on boob so gave him 2oz of formula, he promptly fell asleep for 2 1/2 hours!? Not the first time he has screamed though. Could he have jaw ache or something or is he refusing boob altogether? I have been giving top ups at 5pm feed for last week as he screamed after gave both boobs. Is he refusing boob as easier to get from bottle?