DS is 4.5 months and still startles himself awake at night which means he won't stay in his crib for more than an hour or so. Online it says these reflexes should start to disappear now? DS is fighting sleep terribly but I've noticed when he's tired he becomes particularly twitchy and it makes him cry even more that his body doesn't relax (if he's overtired mainly).
I have looked into Infantile spasms and it doesn't seem to be this.
Does anyone else experience this? When will it go away?