Does anyone know how I can get my old stories and questions from EP?

There is an import option that is supposed to do something like that but I don't know if it works, I haven't seen a big influx of carried over content.

You can download a zip file from EP.
I imported it a couple of months ago to here.
Who knows how long that will take.

You can go to ep's site and request an archive of your account.

You can import, I think it's in account settings.