I can feel my anxiety building, it is only me and him in the

I can feel my anxiety building, it is only me and him in the house, our older sister is out at an appointment, and our mom won't be home from work for hours. She is a teacher and is at graduation. What do I do? He is being so hostile and angry at me.

I'm so sorry I wish I would have seen this sooner, if you need to talk im,here I'll support you so you can message me