I really do understand that feeling
I was really fortunate because I was already working and so I had more options.
That is why I suggested you contact a Domestic Violence center in your area. They can help you with the logistics of becoming independent as well as being safe. Your guy is a little unpredictable. I think it would be smart to have their input.
One of the important things SR taught me was that I don't need all the answers from now until the end to do something. I just had to do the next right thing. That is all and that wasn't quite as scary. I do that - and then the next right thing after that will be revealed when it is time - and I will do that. ,etc. etc. If I keep going, I will end up in a better place.