Hello guysI think you are looking for ...... It All Falls Down by mimiFish
I have been searching for this story for a very long time.
From what I can remember it was AH. Bella and Edward where celebrating (think anniversary) and get attacked/assualted on the way back home after taking a short cut. Bella I believe is sexually assaulted and wake up with memory loss. The story recounts around Bella trying to remember and Edward explaing how they met. I think bella is pregnant at some point. Don't remember if she actually does get her memory back. Rosalie is also involved and may have caused the problems and Edward does not forgive her.
If anybody has any ideas, it would be a great help.