^
This
And until you get an appointment, try to do things that make you feel less frustrated and more happy, things that can help you get your mind one something else, something positive - Point being to try to prevent/reduse self harming thought's and actions, in addition to prevent yourself from thinking about causing damage/hurt to other people.
Wish you well
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"Always forgive your enemies - nothing annoys them so much" - King of dandy, Oscar Wilde