What happens next?

As much as I loved the ending to the series, I can't help but wonder what will happen next.

Bella has made the transition from human to vampire as seamlessly as possible, I think. She has adapted to vampirism so well, at least in part, because she essentially has given nothing up. Her transition was all gain. She has the child she didn't even know she wanted (who will be fully mature and virtually invulnerable in an astonishingly short time), her husband, and she gets to keep her family in her life, at least to a limited degree.

What will happen to Bella when the reality of vampire life sinks in? Although she and Edward should always have each other, Bella has never been all about Edward, despite criticism to the contrary. Charlie, Renee, Jacob, even her high school acquaintences have always been concerns for her. What happens if Renee gets hit by a car and is paralyzed? Or Charlie gets cancer? Will Bella still be "Bella" and try to fix everything by turning one or the other of them?

Let's say nothing like that happens: how will Bella deal with it when everyone she knows and loves dies? Or, more immediately, when they finally do have to leave Forks? Even with Charlie's limited knowledge and acceptance, they can't stay in Forks forever. Will Bella be able to deal with watching everyone around her grow old and die?