In DBT they teach stress tolerance techniques. One is to put your face into cold water. This will create an instant calming effect. It's something deep sea divers experience.

This article relates to BORDERLINE PD, but is helpful for anyone who becomes overwhelmed. Have a look at the techniques, try them out and see if they work for you. Good luck.

https://www.google.com/amp/s/borderl...?client=safari