Some shit, please help

I'm freaking out right now. I'm having a horrible panic attack. I just heard my dad hit my mom. I was just using my MFLB and enjoying a can of pringles then I started hearing the screaming. I'm stoned out of my mind so I don't think I can go out there and do anything. The only other person here is my little brother and he is too little to do anything. I tried contacting my older brother but he won't pick up because he is probably asleep. I don't know what to do. I can't calm down. I just need someone to talk to.