I think the part about getting kidnapped by a healer that worked for sesshomaru is from second alliance RATED MA.

www.dokuga.com/fanfiction/story/8948/1 (again RATED MA)

OK I think I mixed two stories up there was another one where Kagome is the daughter of a god and each of the cardinal lords offer her something and she has to choose and she is saving the demon race from a sickness of some kind she has to merge with Sesshomaru because the sickness has demon and Miko attributes that are killing everyone, and they also get spots on them I think.. I do remember that during the ceremony she gets something of value from each lord/lady.. any ideas? Also I think at one point she gets kidnapped by the healer who worked for Sesshomaru

This sounds like Children of the Gods, by K
You can find it here: dokuga.com/fanfiction/story/4509/1

It is rated MA.

Children of the Gods! It's one of my favorites.

I think the 'kidnapped by a healer that works for Sesshoumaru' happens in Laying Amongst Dokatsu (www.fanfiction.net/s/4624868/1/Laying-Amongst-Dokatsu) but the story is incomplete.

EDIT BY WICCAN: "Children of the Gods" is rated MA, NO YIMs! "Laying Amongst Dokatsu" is rated M... again, no YIMs!