There is always a chance of a break or soft tissue damage in the failing they can get into when stuck. It is impossiable to say what is going on from my living room. No one can make any sort of diagonosos from a computer. We can only guess.
That said there is a good chance that it is nothing more than a scuff on the edge of the tub. Unless there is someone experienced whom can check on her there is little you can do now. When you get home very gently remove her and put her on a surface (freshly made bed) and watch her for what she does. If she behaves differently I'd go to the vet but if she is exploring with tongue flicks I might wait and keep a close eye on her keep the scrap clean and if I had some a dab of silver sulfizidine. Polysporin often will effect the scales and soften them so in something minor like you are describing I would not use it.
Keep a very close eye if there is any sign of anything out of the ordinary it is time for a vet. Personally I have a emergency animal fund and a great vet so I would likely get a check up and xrays anyway but that is likely to be 100$ (visit and xrays) and is likely unfounded if the animal is behaving normally.
For future reference, if you have good ventilation a spike in humidity is either pee or spill or the rooms humidity increased. I have a hygrometer in with all the snakes but also the room. If the RH is basically the same, room (give or take 5-8%) and enclosure, I don't worry, if it is higher in the tub, I correct the cause, and let it come down on its own, it will in a hour or so if there is enough ventilation.