Originally Posted by doctor blue box:
“after the events of time of the doctor, the future was changed so he never died on trenzalore, which as far as i can see means no grave, no exposed time stream, and therefore no clara ever being the impossible girl, so my question is how exactly did they get together, i mean i know they may still have the memories as they originally were, time travellers at the eye of the storm and all that but what im saying is if someone actually went back in time now in this changed ne timeline, what would they see?”
From Good Night:
"The thing is, Amy, everyone's memory is a mess. Life is a mess. Everyone's got memories of a holiday they've never been on or a party they never went to, or met someone for the first time and felt like they've known them all their lives. Time is being rewritten all around us, every day. People think their memories are bad, but their memories are fine. The past is really like that."
Clara went into the Doctor's fissure when it still existed. It doesn't exist any more, she couldn't do it again, but just because it never existed doesn't mean it
always never existed.