Check up at the vet today went great! Couldn't see any signs of URI, she was breathing very well, and said that he didn't see any reason to bring home any medication. So, I'm moving her enclosure (which was near a window), and bumping up the temps 5 degrees or so, and watch really closely the next couple weeks.

It may have been saliva, you are very correct in saying they salivate a lot during feeding, haha.

Thanks everyone for your help!