Oh man that sucks. I have heard they are much more prone to RI during breeding. That's one reason I keep my temps the same during breeding season rather than dropping temps. A friend of mine didn't even drop below 70 degrees and ended up with an RI. It definitely happens even when you are being careful. If I were you I would get her treated ASAP and bump the temps up for everyone to help avoid anyone else getting it. Keep a close eye on everyone, I'm not sure if you need to treat anyone else unless they are showing sign, that would be a question for an experienced vet.