I have to take anti-anxiety meds or I wouldn't be able to function. Some other things I use are to focus on my breath. We tend to take shallow breaths that only goes into our upper lungs. When I focus I work on getting it down into the lower part of my lungs. If you have another episode see where your breath goes. Another thing I'll do is to try to re-focus my attention. I'll pick a single digit number and count up to 100 by that number and then back down.
If I can get my mind on something else I can sometimes get myself out of that situation.