I believe you have very good grounds to file for an order of protection. I am truly afraid for you. I agree, keep putting it in black and white and share with those you trust (not just on here but face to face). You need people who support you. You also need people who can help you get yourself and your children away from him if need be. I agree that his behavior is very scary. Please please keep your eyes open to this and recognize it for what it is, Abuse. Almost all communities have resources for people in your situation. Many of those resources are free. Please please reach out.
I hope I do not come across as nagging at you, I truly care and truly want you and your kiddos to stay safe.
God Bless!