Searching, I am so sorry that you're going through this. Please know that you're worth more than putting up with the abuse until your kids are off to college.
And... I don't think your children would be happier living in a home where their momma is often scared or hurt. I worried about the same thing with DS. But even with the uncertainty I felt, DS blossomed after we got away. He went from a quiet little guy to a rambunctious goofball who liked to tease and run and laugh.
The counsellors at the local DV shelter were able to point out and find so many options. The hardest part for me was asking for and accepting help. Have you talked with them about the protective order?
Hugs, if OK. Wishing you continued strength.