Looking for a Fanfiction

Hello Everyone I am looking for a Fanfiction which I read quite some time back.I don't exactly recall the name but I remember many of the plot points.

First of all this is a crossover fanfiction with a novel series.The plot was that Pregnant Lyanna and Arthur Dayne were kidnapped from the Tower of Joy and taken to earth.Earth has magic and several families have magic.Jon was raised in one of the magic family and he can do magic.Lyanna and Arthur sadly died.

Now for some reason Jon has to return to Westeros and met Robb-who was in Riverlands then, fighting against the Lannisters after Ned died.Robb naturally didn't know the existence of Jon and was happy on seeing him.He lived in Earth.

ultimately Jon fulfilled his mission and returned to Earth.I don't remember the name it was a crossover fanfiction.Can anyone tell me the name?>!​!<

Edit the Name is ""Dragon in Exile" by ChelleyPam.Thank You for finding this fiction for me.