When did you know that it was time to quit your job?

When it started to take a toll on not only my mental health, but my physical health as well. My stomach actually rebelled at the thought of having to go to work every morning, and when things really got ugly, I started to feel like something heavy was pressing down hard on my chest and it became difficult to breathe. That was when I knew I had to get out of there, as soon as I could get another job.