for wasps and bees and ex-special forces
If you have other symptoms ( death...) go visit a doctor.
I just about stood on a western brown snake two days ago, if it bit me no amount of benadryl would have helped and we were 100s of kilometers from any help. That could have been "lights out".
As for scorpions, centipedes and similar nasties, we see them all the time. On the few occasions I wear shoes (once or twice a year) they are a good reason not to leave them out over night.
Silly little bug and I go all girly.....
It left no mark or any indication I was stung when it was all over.