Watch: Katie Price discuss drink-drive crash with her mum
The 43-year-old reality star and mother-of-five - who escaped a jail sentence shortly before Christmas after pleading guilty to the driving offences - discussed the crash in an emotional chat with her mum Amy Price in new BBC documentary Katie Price: What Harvey Did Next.
Amy tearfully told her: "Everyone's had to step up and help protect you now. Imagine if something had happened in that accident. How do you think Harvey would have coped?"
She added: "For you to do what you did do, it must have been something dreadful.
"For me to have a phone call saying 'I've just had a crash.' It was unbelievable, I couldn't believe it.
"I was speaking to this guy who got you out of the car and he was saying to me I don't know how she survived this. You saying to them, 'I don't know why I'm still here.'"
Amy was diagnosed with terminal breathing condition idiopathic pulmonary fibrosis (IPF) four years ago, which causes scarring on her lungs and makes it difficult to breathe.
Katie told her: "There's no one to blame for me getting in that car for myself. I wasn't telling myself don't get in the car I was saying I just need to go. I'm lucky.
"There's consequences for that night I need to put up with now. I need to see a therapist once a week because I need to learn to cope when these situations happen. I don't want to go into self-destruct."
Katie's younger sister Sophie Price also discussed the crash in the documentary.
She said: "When people have mental health problems, they're good at covering it up. She doesn't really talk about her feelings that much. It's good because she's now talking to us about them.
"We've made it clear to her if something is wrong or you're not feeling right, you've got to just be open and tell us. She could've killed someone, she could've killed herself. Harvey's not aware of the situation and he wouldn't understand it."
Harvey, 19, was born with Prader-Willi syndrome - which causes extreme appetite and weight gain - partial blindness and severe autism.
Katie has won praise for opening up about life raising her disabled son in BBC documentary Katie Price: Harvey & Me.
The former glamour model - who was declared bankrupt in 2019 - is also mother to Junior, 16, and Princess, 14, with first husband Peter Andre; and Jett, eight, and Bunny, seven, with third husband Kieran Hayler.