Years ago on ff.net I came across an author who went by the penname of Sigourney. Her profile is still up today but she deleted all of her fics because of her mother worrying about copyright laws. This was like before 2005 I think, but to this day I still think about her fics and I wish I could reread them.
I remember one of them was almost like the book/movie Misery by Stephen King, but Mulder and Scully are investigating a case and they get into a car accident accident where a group of sadistic siblings living in the wilderness hold them captive. Another one of her stories was Scully getting kidnapped by as I remember a crazy janitor or something like that who was replacing an ex girlfriend. He holds her captive and drugged for a really long time in the FBI in a ceiling or old office or something, dyes her hair blonde, I think he might have taken her to his house eventually but I can't recall. Mulder with the help of someone (maybe the lone gunmen) realizes where she is because they find rather ingeniously a missing part of a surveillance feed outside their office. It culminates in an FBI bathroom I think; there's a fight but it ends well as far as I remember.
She had other fics I think, but those are the only two I recall. I'm almost positive she was in the middle of one when she decided to delete all her stories.
Anyway, if anyone else remembers this author's work and knows if it either got archived on Gossamer or something or if she has another account besides FF.net where she didn't delete her stories, please let me know!
(also, I watched the series in 2006 as a 12yr old 7th grader and this summer at 20yrs old I rewatched the entire series on Netflix, finally! Since then my tastes have considerably improved as far as fanfiction, but I've been out of the game for a while so if anyone would like to send me in the right direction as far as "classics" or any of your favorite stories/authors I'd appreciate it!! I've found Gossamer but it's super overwhelming with all the options to go through! Thanks for the help!)