Agreed. I have had a female who decided to investigate a fallen ornament, and sliced herself open from the hole in the bottom and she lived. I also had a calm female betta in a sorority go crazy and attack the second-up betta, who was floating when I woke. She survived too! Bettas are very stubborn, even in times of trouble! Keep doing what you are doing.
If by chance she passes away do not be hard on yourself. Remember: YOU did all that you could to give her a fighting chance.