My very earliest memory was being stung by one. I was playing in the backyard. I think I was 2 or 3 years old.
Since then I have been absolutely terrified of wasps, to the point where I will shrink away from any medium-sized flying insect until I can confirm that it is not a wasp. I've run away from large flies, bumblebees, honey bees, and even ladybugs on occasion.
And same here, I've been stung out of the blue so many times. One crawled down my shirt and followed me inside, then stung me when I leaned back in my chair. I got stung three times on the leg when I went over a hidden underground nest with a lawnmower (I was also terrified of mowing the lawn for a couple years after that), one stung me on the chest while I was biking, and I also got stung on the chest when one hid on my towel and I went to dry off after showering. I panic when I see one and it's everything I can do to not make sudden movements that might anger it. But the thing is, all of those times I was stung before was NOT the result of panicking; I never even saw it before being stung.