She's gotten a bit calmer over the last couple days, although she did try to give a small bite to her tail in the holding tub today while I was cleaning her tank. She's on paper towel now to keep her tail cleaner while it's wounded, and with less decor so she has less stuff to hit herself against if she starts thrashing again. I also sprayed some vetericyn on her tail and will continue to monitor her. I'm not sure what else I can do besides that. The vet emailed back, but all they said was that this can be caused by pain, which I already knew, and that they might need to see her in person to figure out what's going on.