Need advice (not really pregnant related)

So my baby's father just lost his dad 3 days ago, and he's taking it quite bad but today he's kind of hit rock bottom out of nowhere he just starts letting out all of his anger on me and it's upsetting me and stressing me out because I don't know what to do. I've never had to deal with this before I'm due any day now and I just want to help him keep his mind focused before our baby gets here so he won't continue to just have these random moments. Any advice on how I can help him deal with this, it hurts me to see him this way.