help me! harry/cedric soulmate

[hogwartsgrad81]

this is what I remember:

-marriage contract with ginny that harry knows nothing about
-harry and cedric are soulmates
-ginny and cho try to separate them
-remus and sirius are alive(possibly together)
-harry and cedric go back in time to train with the founders and I think merlin
-i think it's harry and cedric's son or grandson who go back and pretend to be
students
-hermione knows something about the marriage contract
-could swear that hermione and ron were together in start of story but have
other soulmates and that ron's is twilight's edward..
-remus is like a protector or something because in the middle of the great hall
he gets really mad and yells at Ginny after she said dumbledore promised her
harry
-Teddy sees harry looking at a picture in the beginning or start of the story.
-someone(i think Teddy) calls Ron "Uncle Ron"

thanks!