The former model, 43, expressed her fear to close pals as judgement day looms, which takes place 49 days after she rolled her BMW near her home in Horsham, West Sussex, during an all-night drink and drugs bender.
She admitted to charges of drink-driving while disqualified and without insurance, and tested positive for cocaine, before checking herself into The Priory, a condition imposed as part of her bail terms.
‘Unnerving’: Katie Price is ‘terrified’ she could spend Christmas behind bars ahead of her drink-driving sentencing on Wednesday
A friend told MailOnline: ‘The devastating reality of her situation is starting to hit home and Katie is terrified. It’s a reality she has never faced before, which is understandably unnerving.
‘It’s not just herself who she’s worried about, it’s the potential reaction of her children.
‘She can’t stop thinking about it and is full of dread, but has been planning as if she is going to have a normal Christmas for the kids as a distraction.’
As well as spending time in rehab, Katie managed to secure a visa to travel to Las Vegas with fiancé Carl Woods during the lead up to the sentencing, sparking speculation they were set to embark on a quick-fire wedding.
‘Worried’: Katie, pictured with son Jett, expressed her fear to close pals as judgement day looms, which takes place after she rolled her BMW near her home during an all-night drink and drugs bender
She also flew to Belgium earlier this week to have further cosmetic surgery, where she allegedly had her 13th boob job.
The mother-of-five, who will be sentenced at Crawley Magistrates’ Court, took ‘full responsibility’ for the crash in a statement released by her family – on her behalf – on October 23.
It read: ‘Kate acknowledges and takes full responsibility for her actions. She knows they were wrong and apologises.’
The accident, which took place on the way to pick up more drugs, was a new low for the reality star, who has squandered her £45million fortune.
Makeover: Katie reportedly flew to Belgium earlier this week to have further cosmetic surgery, where she allegedly had her 13th boob job
Lovers: In November, Katie and fiancé Carl Woods flew to Las Vegas, sparking speculation they were set to embark on a quick-fire wedding
Her ex-husband Kieran Hayler, the father of her children Jett and Bunny, told MailOnline he feared she would ‘end up dead’ if she continued her trail of destruction.
Speaking shortly after her crash, which resulted in being rushed to hospital in an ambulance, Kieran, 34, said: ‘A lot has happened recently, and I felt like ‘oh my God, not another thing, when is the drama going to stop?’
‘And then I feel sad because this woman has been through a lot recently and now it’s another thing.
‘How much more can somebody take before they break? If Kate carries on like this, she’s going to end up dead.’
‘So cute’: This week, Katie shared an image of children Jett and Bunny, who she shares with ex-husband Kieran Hayler, alongside an emoji of the world
Kieran added that he would never have allowed Katie, who’s also a mum to Harvey, 19, plus Junior, 16, and Princess, 14, from her marriage to Peter Andre, to look after their kids if he knew she was taking cocaine.
He explained: ‘I would never let Kate look after the children if I knew she was taking cocaine. If anybody knew more, they would have stepped in to try and help sooner. She’s kept it all to herself and that’s why it’s got so bad.
‘It’s difficult to answer if she has a problem or is an addict because I don’t know. It’s not something that existed in our marriage.’
Speaking on a podcast in November, Katie declared that she ‘hated’ the fathers of her children and her relationship with them is ‘non-existent.’