Charlotte has explained she was admitted to hospital and had to undergo an urgent operation to remove her fallopian tube as it had torn and she was bleeding internally.
Doctors told the 26-year-old if she had left it any longer to seek treatment, she "could have died."
Speaking to Heat magazine, Charlotte opened up on her ordeal and explained she wasn't able to speak to Gary about it all until after her operation. He was in Thailand filming for the fifth series of MTV dating show Ex On The Beach.
When she did get through to him, Charlotte explained that he had been "lovely" about the situation.
She said: "I was so scared that I wasn't going to be able to have babies. I want to have children... They reassured me that I'd still be able to have children, I'd just have to try a bit harder. I was crying on the phone [to Gary] and he was being so lovely… I was really in love with him."
The on/off romance between the pair now appears to be completely over, however. Charlotte said: "All the times before I knew we'd come back together somehow, but this time I knew that was it."
When contacted by Reveal, a rep for Gary declined to comment.
Following news of Charlotte's interview about her ectopic pregnancy, Gary appeared to respond on Twitter. He cryptically tweeted: "Wow at what I just heard.... No more sitting back... No more being quiet... Going to be an interesting week..."
Fans have urged Gary not to sort things out with Charlotte in private. One follower commented: "@GazGShore Please respond in private Gary make yourself the better person, people have respect for you having dignity in this situation."
Wow at what I just heard.... No more sitting back... No more being quiet... Going to be an interesting week...— GAZ (@GazGShore) May 30, 2016
He fooled us all.....Sadly what I have realised is that has only ever been for the cameras https://t.co/NzNnGvoX8E— Charlotte Crosby (@Charlottegshore) May 31, 2016
Charlotte, meanwhile, appeared to hit out at Gary on Twitter. She tweeted: "He fooled us all.....Sadly what I have realised is that has only ever been for the cameras."
Charlotte also shared a defiant quote on Instagram that read: "She refused to let it break her. She faced tragedy, she felt pain and it only made her stronger."
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