Hide in your room? You have your own, I hope? Get a deadbolt and hide! Tell them if they ask that you are working or something.
Try to hang on. You can do this. Their problems are not yours. Just try your best to ignore it, hard as that might be. Try music and headphones to drown it out.
If you can work, maybe find an evening job so you are gone when the worst is going on? Also, start looking for someone else who needs a roommate. You might get lucky there.