My last trip to the herp vet a couple of weeks ago reiterated the basic advice for people who think their snakes have RI's.
Switch to paper towel substrate.
Bump up temps.
Keep humidity up.
If there's no mucus or mouth slime type stuff, and she's still eating it's a good sign, but if the wheezing persists you may really want to take her to a vet. Even if it ends up being stuck shed or something caught in her nostrils, it's better to be safe than sorry.