How old are you? Get out of the house. Go to the public library and stay there until it closes - it is a safe place. You also need to eat and drink to quell anxiety. Do you have pocket money? Do you know the phone number of her psychiatrist? Back to how old you are, because your options depend on your age. Going for a brisk walk would also quiet you down, but most importantly, do not stay in the same room with her.

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