Stress-chilling

verb; describes a state of being where one is outwardly chill but inwardly panicking

What someone does when they’re procrastinating, stressing, and hiding from responsibility; you’re still bothered but not willing to do anything about it

Co-worker: “How was your weekend?”
You: “I’ve got a big deadline coming up so I was stress-chilling. I caught up on Netflix while also having an anxiety attack.”