I don't see dealing in what ifs as a useful thing, because what matters most is what IS.
I have also learned after a proper healing, most people don't want to go back, they are enjoying going forward. They seem to have found something better than what they had, which was exactly my case, back in the day.
NC is about healing for the purpose of being able to make better decisions for yourself based on facts, and not just feelings. Really simple, what facts do you have that say she has changed her mind, and wants you back, even though you want HER back? We call that false hope, and its a distraction for clear gathering of facts.
And speaking of facts, SHE DUMPED YOU, instead of working with you to make things work. Its a fact she just wasn't WILLING, so what has changed? And its a big red flag, when partners are not willing to work with you, but would rather break up. Then the only FACT that remains is healing, and moving on.
Its obvious to us all just as an aside here that your thoughts and curiosity are very typical to the feelings we all have after we go through a break up and the hurt is still fresh. Will you get another chance? I don't know, I just hope you are healed enough to make a good decision for yourself, IF it does happen.
Most that have healed don't want the exes back, despite all the good memories, intense feelings of the past, or the newfound willingness of an ex to try again. Just me, why get dumped TWICE by the same person?