I've had anxiety for years, but I don't know if I've ever experienced a panic attack.

Yesterday (at work) I was extremely overwhelmed, I couldn't breathe properly, couldn't control my shaking, and cried until I managed to hold it back. I know it's to do with social anxiety, because I was in a situation where there was too much going on, a lot of responsibility, and a lot of people I was interacting with in such a short amount of time.