I wasn't paying attention when I asked her about curing vampirism for herself. She said she had to go and something along the lines of being back soon? Then she ran off and I don't know where she went. She is a great follower and I want her back. Any details would be great.

just did that myself. she cames back to dawngaurd realy fast. do a few quest she wil be back in no time

Usually i use he wait function for 3-5 days and she will be back at the fort sitting on a bench.