Been there, got the stinger. Same as you, came in from a ride, felt something in my shirt, so I did a pull on the spot, then a scratch, and a rub them WHAM, OUCH! Quickly reached in and smashed it. I've also stepped on one. in bare feet. Drove the lawn tractor over a ground nest just before getting off of it, that was good for five or six stings. And had to slowly and carefully stop on my bike to remove a bee that was crawling around the inside surface of my glasses.