Breathe deeply. Do 7-11 diaphragm breathing (count to 7 inhaling, exhale for a count of 11 or even longer). Repeat for several cycles. This triggers your body to relax and grounds your anima with the earth. Your anima is in your breath - reawaken yourself by deep breathing often.
Do yoga, tai chi, or other kind of meditative exercise.
Definitely talk to someone, preferably a professional; otherwise a close friend. Talk out your fears and what's going on in your mind. Don't be afraid to open up.
I am a high-anxiety person and have had lots of panic attacks in the past. As a result of 10 years of yoga, increased self-awareness, therapy, living a slower lifestyle and not putting so much pressure on myself, I've become a more chill person who deals better with stress. I highly recommend talking to a mental health professional or a group session.
My ENFP friend deals with anxiety with tranquilizing drugs. I think they have more of a placebo effect on her, personally.