"I was pregnant and then I wasn’t," she wrote, alongside a broken heart emoji.
"Miscarriage is so hard… and after experiencing it myself recently and hearing the stories of other women and couples, I realise how common it is. I feel that it’s clearly not spoken about openly enough.
"It’s been a really rough time… the rollercoaster of getting my head around being a mother again and then suddenly having it taken away. I’m working my way through it and have had great support from my psychologist and my mates."
Isabelle opened up on Instagram as she shared this photo.
"What’s also been challenging is simultaneously supporting myself but also Alex as we process our individual losses," she continued in her post.
Isabelle’s former Gogglebox co-stars Yvie Jones and Angie Kent were among those to share their support for the star as she shared her story on social media. Isabelle also revealed she's had the support of her loved ones as she and Alex told them 'early on'.
"We shared our happy news openly with our friends and family early on and we don’t regret this because it’s enabled us to be so well supported as we get through this," she wrote.
"I now understand all the amazing women who have been through this and my heart goes out to all of you… wherever you are."
Isabelle and her fiance Alex say they have been "well supported."
Tina BurkeTina Burke is the Digital Managing Editor of Entertainment at Are Media. She's obsessed with all things pop culture, entertainment and lifestyle. When she’s not talking about the latest TV shows, you’ll find her aimlessly scrolling through TikTok.