I got PF when my DH dragged me around New Orleans for 3 days and all I had packed was--really super cute sandals, with ZERO arch support. Okay, okay, it was stupid, I admit. But I didn't know it was going to be a forced march!
I pictured lounging around the pool, a hurricane in my hand...dinner reservations at an intimate corner table for two...not tromping around in a circle endlessly...
(He wasn't my DH yet, he was only my DF, and I didn't want to complain, so.....
Now, we've been married a long time now, and if I had forgotten my shoes today, Stop #1 would have been the shoe store. Trust that.
)
Good advice on here. Dashzap really nailed it all. I also wear socks with compression in the arches, and consider speaking to your doc about a cortisone injection. Until it goes away, DO NOT go without shoes that offer good support.
Good luck and I sure hope that you are better soonest!