The former glamour model has been very open since arriving in the house last Friday, including giving graphic and explicit detail about her sex life with former lovers.
But now she appears to be having a few regrets.
In tonight's show, viewers will see Katie telling Michelle Visage she is dreading hearing the public reaction to her during Friday night's live eviction because of things she's said in the house.
"I've been more detailed but I can't help it!" said Katie.
As well as discussing her sex life in detail, she was the one who nominated Calum Best for eviction while saving Katie Hopkins from the same fate.
Big Brother gave Katie a secret task on Monday evening, saying she had to save one of the nominated housemates from eviction and nominate somebody else instead. Then, on Tuesday night's live show, Katie had to reveal her choices to all the housemates and the public.
She saved Katie H as she amuses her and chose Calum for nomination because she reckons he will never be voted out based on what she knows about the public opinion of him.
Katie H later said she thought this was a risky strategy, while Calum has said he really doesn't want to home – at least not before Perez Hilton!
Calum, Perez, Nadia Sawalha and Alicia Douvall will face the public vote on Friday night and one of them will be leaving.
CBB continues tonight at 9pm on Channel 5.
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