And the TV favourite has now told fans that she was pushing back her wedding to ensure that her newborn would be able to attend, speaking during a Q&A on Instagram.
A fan asked: "Do you think you'll get married before pickle arrives?"
Stacey responded: "We are going to move it back a bit, maybe not until next year, but we both said we'd be a bit gutted to look back at our pictures and all of our babies weren't there.
"So for the sake of a few months, we will do it when they're all here."
The pair were previously going to marry at the end of July, but it now looks as if they'll be having an autumn wedding.
Stacey was quizzed on lots more during the Q&A with fans. One asked: "Will you find out the babies gender this time or keep it as a surprise? So excited for you."
"Yes we are 100 per cent going to find out," Stacey replied. "I'm too impatient and I want to decorate the nursery with a theme so we really want to know.
"I will let you all know really soon".
Stacey and Joe told everybody of their pregnancy news on Wednesday evening, informing fans that they had been trying for a long time.
"For a really long time we've been trying for another pickle," she said. "It didn't work out and this was our news quite a few times..."
Stacey's stories then flipped to a screen-grab of a form which sadly read: "Diagnosis based on ultrasound findings: complete miscarriage."
"We decided we were so lucky already to have our boys. It is our biggest privilege in life and we are so grateful to be parents, so we stopped trying and counted ourselves so so so blessed already," she added.
Stacey then went on to explain she had noticed she had been feeling unwell recently, but felt reluctant to check. However, she ended up going for an ultrasound scan, which revealed the happy news.
"We were so grateful to hear an extra heartbeat in my tummy," she said.
"We told the boys and we've spent yesterday and today finishing the Wendy house ready to welcome a new pickle into our lives."
Reflecting on her rainbow baby, she said: "We've never felt so grateful... I have no words. We didn't think we would get the chance. We love you all to the moon and back.
"Lots of love from Me, Joe, Harry, Zach, Leighton, Rex, and our little pickle."