How do I keep calm tomorrow?

tomorrows online exams and we are compulsorily asked to have video chat while filing the questions... I'm telephobic so it makes me extremely uncomfortable and sweaty and a bit nauseous. The professors are jerk so forget sympathy.
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Okay you guys. I'm not worried about psychology exams cuz you know I got it. It's the call that's activating my acid reflux... Just an FYI.
How do I keep calm tomorrow?
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