Remember the old advice that tells you to take a deep breath when your panicking. Well it turns out it’s not as healthy and helpful as we thought it was. That’s because when you keep breathing quickly and deeply both at the same time, you start driving an unusual amount of carbon dioxide out of your system, which causes hyperventilation. That eventually causes dizziness and chest pain if continued.
Next time you panic, instead of deep breaths, try thinking about something positive. Or rather do something you enjoy that relaxes your mind and thoughts. This will relax your subconscious mind, which is what triggered you to panic in the first place.[Source]