So this is an old problem that i had a month ago but i still cannot fix. I am at the Alduin's wall and the next thing to do is "Learn the secret of Alduin's wall", simple enough right? Well Delphine is not there anymore, she is just gone. Only Esbern is left and i believe i need to talk with Delphine to finish the quest. What do i do? I dont want to start over because i already spent a lot of time on the game and im not sure if i would play again if i need to start from the beggining.

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I will move this now.

which platform are you on? PC or console?

She travels around a bit so try waiting for a few days, if this does not work make sure that it is your only active quest and your marker should take you there, if this still does not work load an earlier save or check the pubs as I have found her there a few times