Is it normal for a child to constantly tilt their head back? Scared in…

Is it normal for a child to constantly tilt their head back? Scared in sleep at sudden noises, even though they weren't taught silence, and when they wake up they shake violently with their arms and breathe strangely, like they're running out of air, and I had intracranial pressure from birth, could it be passed on to the baby? Hereditary. It all started three to four days ago, it wasn't like this before.