NUMBER ONE THING IS BREATHE, it sounds cliche but it does help, number two is tell yourself that you’re safe and okay, and number three is splash cold water on your face. (These are the things that work for me)

Whenever I get panic attacks and my heart starts racing I either do these 2 things. The first thing I do is hug a friend or a family member. The point of this is to mimic their breathing pattern when your heart is racing. Ask them to take deep breaths so you can do so. The second option to try if no one is around is a deep breathing technique. Try in for 4 and out for 6. Breathe in for 4 seconds and exhale for 6. Make sure when you inhale you fill your belly with air. Try not to suck in your stomach. I hope this helps.