I'm a bit concerned because on Saturday I hiked in my shorts in the woods, and part of the trail (Darlington Trail) was fern'ed over, and I couldn't see everything on the ground. I saw a few three-leaved low-lying sproutings, and I did my best to stay clear of them.
It's been, at the time of posting this question, 26 hours since finishing my hike.
I don't know if I came in direct contact but think it possible. I've never had PI before, and I've read online a great difference of numbers on how long it takes to manifest itself, from 24-72 hours, to 7-10 days.
So really, how long after exposure to Poison Ivy does one start seeing a rash?