Missed Story Missions playing Co-op

Playing with a few friends some further along and some behind and responding NO to the fast forward prompt, but randomly last night it still skipped every story missing between me and one of my further ahead friends.
No way to go back and re run them, am I just screwed?
Is the only option now to create a new charactor and play the entire game again? Or be very luckily that another friend is going through the missions I missed?
Sadly I play the game for the story and dialog and now I have no idea what is going on.