DIDNT FIX IT!
Almost died again, but she stopped after I vigorously tapped the screen.
This happened a few updates ago and hasn't happened since, but I'm curious if it was a intentional occurance or a glitch:
I was feeding my Vamp. She became full, but wouldn't stop feeding. My character ended up dying. I'm not sure if that was a glitch (and if it was already patched), or if that was a rare event.