Please don't blame yourself, but your OH did assault you twice, once the first time when he pushed you (what if you fell and hit your head) and once when he hit you with the phone (even if an accident, if he hadn't grabbed it, mangled it and thrown it, it wouldn't have hit you, would it?)
Please get out of this relationship, he is showing a pattern of violent behaviour that has made you so scared you posted on here and had to stay awake all night. This is not normal, and just 'how it is', it's really awful.
Post on relationships or elsewhere if you need some support, I think you need to heed the warning though this time, it wasn't a one-off (and even if it was, I wouldn't be with someone who aggressively pushed me ever).