I also have anxiety/panic attacks - but I didn't find out that that's what they were until very recently - when I get distressed, I shake all over, I stammer and can barely speak, my stomach feels full of air, and I feel unpleasantly "light," as if my body's floating away. I cry uncontrollably sometimes, too, if it's particularly bad.
What makes me feel more relaxed after they happen (cuz sometimes even when the "threat" or stressor is removed or becomes a non - issue, I still can't calm down right away - my brain is still in fight or flight mode, I guess) is if I take a nap with my plushies, play with my die cast Cars (you know, stroking them, kissing them, talking to them a bit, not the way little boys play with toy Cars), cuddling under my Lightning McQueen blanket, drawing, or watching/listening to my favorite stuff on Youtube. I find that Youtubing Sterling Holloway and listening to his voice for awhile helps a lot. 
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I wish Sterling Holloway narrated my life.
"IT'S NOT FAIR!" "Life isn't fair, Calvin." "I know, but why isn't it ever unfair in MY favor?" ~ from Calvin and Hobbes