My little guy is 9 weeks 6 days. He just woke himself up with a blood curdling scream. It was only one loud high-pitch long scream. The loudest scream I've ever heard , it scared the crap out of me I ran and turn the light on and he was just laying there with his eyes open staring at me. He sleeps in the bassinet next to me and he was sound sleeping before this incident and he seems fine now. Any idea what could be causing this because it really scared me.