Update: She just shed and all the gunk clogging her nose came out as well and she's back to breathing normal. I was in the middle of making a vet appointment when I noticed the shed. I changed her bedding to paper so that doesn't happen again. Cleaning out her tank I noticed a bunch o smaller fibers/dust at the bottom which was probably what got in her nostrils when she burrows. I'm gonna keep an eye on her though just in case.