Sleep baby, sleep

Why oh why won't Sophie sleep lately? From 8 weeks on she was a sleep champ. Sleeping 10 hrs through the night, I thought we had a wonderbaby! But the last month or so she's been waking up once a night. That's fine, I can handle that, because she'll normally cry out, I give her a bottle and rock her, and she goes right back to sleep. Not the case this week. Last night she woke at 9PM, 4AM and 6AM. Each time we had to rock her anywhere from 30 minutes to an hour to get her back to sleep! What is going on? And the minute she does wake she immediately gets into her favorite sitting position at the opposite end of the crib, or crawls around. We're thinking of trying to give her rice cereal this weekend and hopefully that will fill her up, but I'm not convinced that she is waking because she is hungry. It seems she just doesn't know how to get herself back to sleep lately. And I have a feeling we're doing things wrong.

It may be time to CIO (cry it out). Something we've been dreading but feel may be necessary for her (and us) to get a good night sleep again. I ordered the Dr. Ferber book from Amazon and can't WAIT to get started!