I think it depends on how often and how consistent it is. I'd bump up the temps a couple degrees and keep an eye out for any other signs. I've heard slight whistling and/or popping while breathing usually around the time of shedding, and it's usually just shed in the nose coming loose, or stuck shed.
I'd definitely check her mouth for mucus though. I usually use a Q-tip (the stick part) and roll it towards the mouth to open it. Be sure you have a secure grip on the head otherwise you're gonna get bit lol. It only takes a few seconds to check, and be careful of the teeth, don't force it.
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