I'm sorry about your loss, miskairal.
When I read the post, I didn't think there was much hope, or time.
Sometimes females just die after giving birth, for no apparent reason. I don't think that it was a problem with the swim bladder (occurs in young fish usually) and I've never heard of a "bubble".
The increase in temperature probably caused her to deliver, and what you did with the fan over the water probably DID help, quick thinking. :o)
It also sounds like you are on the right track in setting up another tank and separating the males from females.
Again, my condolences.
Good luck, and keep us posted, OK?
gg
:o)