vampire diaries/ twilight
hunger games/ divergent
kimba the white lion / lion king
there exist a lot of stories coping each other. orginality dosent exist anymore its dead. no matter what there will always be a story out there like yours.
even if you where copying a story someone els made if you give it a orginal spin its your story. and if you are not at all copying a story you should not at all worry about it.