Spike and Buffy experimented on at the Initiative

Hello,

Any help finding this fic will be greatly appreciated:

While Spike and Buffy were held captive iat the initiative base, Buffy became pregnant by
artificial(???) means. To heal I believe Spike drank from Buffy a few times.

girl_saint86
I think this might be the fic you are looking for. It is complete at EF.

Lonely In Your Nightmare by Bloodshedbaby Rated: R [Reviews - 150]

Summary:
During an alternate season 2, Buffy was kidnapped by a secret miilitary group and used for experimentation purposes. Upon her escape, Buffy must stay on the run to avoid recapture by the relentless soldiers who want her back. When she discovers she is pregnant through their experimental tampering, her desperation to stay one step ahead of them escalates. Yes, this is a vampire/slayer fic, and of COURSE it's spuffy.