Thompson’s lengthy post was accompanied by a picture of herself with a baby bump and a second image of a positive pregnancy test.
The 30-year-old had not announced her pregnancy to fans.
She wrote: “I don’t know why I feel the need to keep justifyingthis post, I definitely don’t, I think I’m a bit scared because it’s soraw and slightly out of my comfort zone.
“I guess it’s also because there is no easy way to say it, norany way to sugar coat it, but earlier this year we lost our baby and itwas HARD.
“I had no idea that it was possible to love someone that I’d never met quite SO MUCH.
“From the moment I saw the lines on the pregnancy test I startedto build an emotional connection and my whole world changed, and forthat to be taken away was devastating.”
Addressing other women who have also suffered a miscarriage, she added: “This whole business of fertility can be a ROUGH and OVERWHELMING RIDE – if you know, you know, but you are NOT and WILL NEVER BE alone.”
Thompson has appeared in Made In Chelsea since its first seriesin 2011, progressing to become one of the E4 show’s main characters.
She also shared her experience of talking to friends and family about her miscarriage and how that had helped her.
She added: “Having opened up to a few friends I realised thatthere are quite a few others who have gone through something similar.
“I found it very comforting to talk to them about theirexperiences of loss and grief, and I also found it incredibly comfortingto learn that there isn’t really much you can do to prevent it fromhappening.
“I don’t feel any guilt or blame for what happened to me. It justwasn’t meant to be, and hopefully, it will create space for somethingbeautiful in the future.?”
Thompson signed off by sharing resources for others who has a lost a child.
Libbey joined the cast of Made In Chelsea in 2016 when the series was filming in the south of France.
The couple got engaged in 2018 after he proposed during a hiking trip in Los Angeles.