my friends baby girl Annie who is just a week older than your Caitlyn pulled herself up out of the blue just maybe 2 days ago! Came out of nowhere, was sitting in her cot and was frustrated just sitting there and her mummy put her arms out towards her as if to pick her up and instead, Annie grabbed the the top rail and just pulled herself up! Came out of nowhere, i don't even think she knew what she was doing, her mind was just set on trying to reach her mum. After a couple more practices doing the same thing, she's a pro at pulling herself up!