After spending a good portion of my day researching all this, I think I figured out that the problem is actually with the hot tub itself. I gotta get me some test strips, because I think something's off with it. That just gives me the heebeejeebees thinking that I picked up bacteria from the hot tub. Eeeewww. But as far as I can tell, that's just a hair follicle infection and not very transmittable. Regardless, I'm being very careful, and am keeping my eye on dd and dp.
That was still very helpful, though, thanks a bunch. Unfortunately I have no medical insurance, so I just kinda have to hold out unless it gets terribly bad. I did soak them today which opened them up, and I've been actually able to SIT since then w/o excruciating pain. Oh, how I missed sitting!