Don't try to clear your mind, instead try diverting your thoughts to less stressful things
Go to an open place- field, Roof, garden anything
Try pacing around in open spaces
Look at aesthetic pictures or listen to music or anything that usually calms you down
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But please reach out to people who you trust. Talk to a friend or a teacher, a family member, a colleague anyone. Once you feel ready
Self harm is never an answer. It might make you feel something at first but with time it fades, the scars aren't visible anymore and the pain isn't there. It will just lead to frustration.
time-to-change.org.uk/what-are-menta…