I talked to the store owner I bought her from, and he said they can take care of her for a while and give her some meds in case its an RI. I'm taking her to them tomorrow.
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The wheezing sound isn't constant, which is why I believed it to be a stuck shed. I can only really hear the sound when she is moving around or doing some sort of "exercise".
As for the snotty stuff where I found the furballs, to what extent do they "smear" it everywhere? lol. Because this wasn't a smear, it was more like an explosion. It is spotted all along the side of the tank and one of the corner walls. It's the most heavily spotted near the bottom, but the snotty stuff also appears all the way at the top of the cage on both of the affected sides.