no mucus or bubbles is a good sign. stuck shed on the nostrils/pits can create raspy sounds as the BP breathes like how rustling leaves make sounds in the wind. how big is she and how many meals has she refused? she could just be off feed b/c BP's are fickle like that. if she had stuck shed, i would guess your husbandry was not optimal. double check your temps and humidity. get it right, make her comfy and she might eat again.
also her stuck shed will come off with her next shed with higher humidity or you could put her in a tub like this: http://ball-pythons.net/forums/showt...ithout-Soaking maybe that would help.