There's Consequences by Forever Me at Sinister Attraction. Rating PG-13
Summary: That's the thing about magic. There's always consequences. Set a year after the finale, Dawn is convinced that she knows what the consequences of Willows spell are and it doesn't look good. (Note: at the end the author mentions a sequel but I haven't been able to find one.)
At Elysian Fields there's Drawn to the Fire by BuffyXenaDQFan. Rating NC-17
Summary: After the events in "Chosen," Buffy and the gang go their separate ways in order to start building the Slayer army. When Buffy discovers that she's carrying Spike's child and a very heavy burden, she seeks out an old friend for help.
The sequel to Drawn to the Fire is Let It Burn. Rating NC-17
Summary: Sequel to "Drawn to the Fire." Five years after rescuing Bex and Bella from the grasp of the Initiative, the Summers-Pratt clan faces new challenges. When disaster strikes the Slayer army, it's up to Buffy and the gang to find a way to fix the mess that's been made. Eventual cross-over with Angel the Series.
Also at Elysian Fields you can find Only Time Will Tell by dampersandspoons (although the pregnancy doesn't show up until nearly the end). Rating NC-17
Summary: A year after the Hellmouth collapsed, Buffy and co., who now reside in London, are faced with an interesting mission. They must retrieve an artifact, however, this one was destroyed over a hundred years ago. In order to retrieve it, she and her watcher must travel back in time to the late 1800's, to the precise location where William lived before he was turned. Will she risk changing history to seek out the one she loves or will she be put in a completely different situation than she'd anticipated in the first place?
Hope these are what you were after and that you enjoy reading them.

Regards
Sarah