Wasp Sting

So I was outside conversing with a friend who was about to go on a date with here hubby. She was dropping off her kids. So I stepped outside for like 1 minute tops to welcome them.  Then I came inside and noticed a lump on my leg above my knee. I thought maybe a piece of wood got up there? Well I sat down to pull up my pant leg...lo and behold it was a wasp! So I was trying to hurry around to the kitchen as to not be indecent in front of the kids to take off my pants. The wasp was nowhere, it must have climbed a bit higher! So I was trying to find it and it stung me above my knee! Ouch! I haven't been stung since I was like 8 years old! If I was sleepy then I was now wide awake and in throbbing pain. The pain subsided and it was just like localized throbbing, some swelling and such. I called my mom because I couldn't remember what people do when they get stung. Plus I wanted some sympathy.  So she said to put some baking soda paste on it. Then while the kids finally played inside I checked online to see what other remedies people do. There was the baking soda paste, then also baking soda and vinegar paste (which I later put on before bed), and also putting a raw onion on it, which is most helpful for immediate pain relief as well as sucking the poison out. So anyway, I opted out for the onion because I didn't feel like smelling like an onion at the time, and am glad for a smart mommy to tell me immediately what I should do. There is now a small bump there and a bit of tenderness but I think the poison is basically out. I don't know how to be more cautious but I guess I will try and will have better empathy for someone who gets stung in the future. Hopefully no one will, and especially not myself or Grant. But the wasps are everywhere in my yard. Hmm.