I have been in a abusive relationship and some things you avoid for the length of time your with them. But, you need to cut your losses with the home you live in, go to a shelter with your son, especially after you place paper work, go to another state with family, anything. Just go hide until he can cool down (sometimes they do not cool down) you can end up dead in these situations. Its time to empower yourself.
You can be strong, if you cannot, then be strong for your young child. No one deserves to live like this, no one deserves to watch this no matter what age !
Find a Womens shelter and remember that objects can be replaced, clothes, you may start at empty boxes, but perhaps those of us at BYC can find a way to help you up. I say help you "up" because you do not need a "hand out" (charity) but you need a hand "up" out of this situation. If there is any way I could help, please feel free to ask. God bless you and may he help you from this situation!!!!