Well, I had a c-section w/ the girls (Baby A was breach), but I delivered my DS vaginally...w/ an epidural. I don't think it prolonged labor at all...considering he was born 3 hours after my water broke.
However, I agree that not "one size fits all" when it comes to labor and an epidural.
I was lucky and never had any lasting effects of the epidural either.
I agree that you should kind of just "go w/ the flow". Allow yourself to be flexible because you really don't know or can you necessarily predict what's going to happen. Big hugs to you!!