Louise Thompson has bravely confided that at the lowest moment in her PTSD battle she hoped a plane would "crash into the house and just obliterate us."
In the same candid video the Made in Chelsea star, 32, revealed she didn't know she had a son, and couldn't "think about anything other than death."
Mum-of-one Louise has documented her ongoing battle with postnatal depression and PTSD since the birth of their son, Leo-Hunter, in November last year.
In a seven minute video shared on Instagram on Monday, Louise explained that she had to step away from the social media platform after suffering severe problems with both her mental and physical health.
She explained that she was now home on an "awful lot of medication" after a hospital stint that saw her just a couple of days away from needing to have part of her colon removed.
However it was the TV star's "cruel, invisible" mental health problems that have proven a bigger challenge, and Louise revealed that several men whose partners didn't have the support they needed during their own battles, which ultimately "didn't end so well", had reached out to her.
She is now, as a result, on a mission to encourage others to speak out.
"I cannot allow others to go through the same experience," she said. "I'm lucky I've had support from my partner, my family live close by, I've had financial support and a crisis team check on me every day to make sure I'm taking my medication and telling me that every day I will get better."
Talking about her darkest moments, Louise said: "There was a time when an airplane would fly over the house and every single time it would fly over I just hoped it would crash into the house and obliterate us because it would be the easiest way to go."
"My brain was so warped I couldn't think about anything other than death, I couldn't think about anything other than past hell and fear. I was scared of everything in my house.
"I was scared of my body, I couldn't look at my body. I couldn't look in the mirror."
Louise went on: "I didn't know I had a child, I couldn't leave the house."
She also feared back to back panic attacks, revealing at one point she "couldn't see, taste or smell" with every word that came out of her mouth "not making sense".
The fitness guru, who is no longer in that "state" now hopes that speaking out will encourage others in similar situations to seek support and open up themselves.
And she provided her 1.4 million followers with words of wisdom from the heart.
"Everything in life is transient. It will get better. You will find joy, you will find happiness again," she told them encouragingly.
"Whether you will have to take medication, that's fine - it helped me."
*If you are struggling with mental health, you can speak to a trained advisor from Mind mental health charity on 0300 123 3393 or email info@mind.org.uk
