I'm looking for a fic in which Kagome goes through the well into the feudal era but it's not "her" feudal era? She somehow gets caught up with Sesshomaru and they have to fight some super dark force together (they might go on a journey or a quest or something?)... it's been a million years since I read this fic and I remember very few details about it, but I do remember it being fantastic and I was hoping someone else knew what I was talking about.

I do not think that it was a drabble fic, and it was likely rated T or above...

Any help would be greatly appreciated!

Hmm... I think you're talking about Tears of the Fallen by Shadowsweaver1. It's rated T on FF.net. not sure if there is a copy on Dokuga though...

Hope this helps!

It might be, but I am not sure. I think the fic I'm thinking of had Kagome meeting a younger version of Sesshomaru? It's not forthright's Unspoiled, though. I know it wasn't a drabble series. Also maybe a dark miko? God, I have no idea... I keep getting parts of the memory of this fic mixed up with memories of House of the Moon but I know they're two different things.

I think someone drew cover art for this fic though...

That sounds a lot like Tears of the Fallen by Shadoweaver1. It's in the spark archive (www.dokuga.com/spark/story/5397/1). It's Rated R, which is equivalent to either MA or M here, so just a warning.

Could it potentially be:
"The Once and Future Taiyoukai" by RosieB. (Rated T on ff.net)
www.fanfiction.net/s/3153922/1/The-Once-and-Future-Taiyoukai
The well was supposed to be stable. It was supposed to send her to Inuyasha. And it failed. Now, Kagome's even farther into the past and she must depend on a young Sesshoumaru, who has no idea of what their shared future holds. But neither does Kagome.

Sorry in advance for any typos! Using my phone for responses makes participation difficult, lol. I was wondering if it may be Embracing Ice by Yabou.

It is rated MA on this site, so no YIMS.

It's somewhat a match to what you describe, especially since none of the other suggestions have fit so far.

Embracing Ice by Yabou
[COMPLETE] She had never known his past and had never really wanted to, but its hard to hate someone when you see the truth. If only the well had allowed her to live in the lies she had built up around him, her enemy...Her Sesshoumaru...

I think that's it, J!!! Thank you all for the help!