We all tend to panic a little.
The shedding process tends to close off the nostrils slightly as the fluid builds between the layers of skin so it is far from unheard off for people to think they have a R.I starting which then disappears completely once they have shed.
It's why we always look for other signs of a problem like open mouthed, raised head breathing etc before jumping to conclusions.
Just keep an eye on the humidity to try and avoid a bad shed.
dr del