The 45-year-old mum, who gave birth to her son Jaxon in October 2014, feared she would suffer complications due to her age.
“I was convinced I was going to die during childbirth,” she told the ‘Loose Women’ presenters on Tuesday 23 August 2016.
“I had written my will 10 years ago but I changed it just before, in case.”
Sweeney, who split with Jaxon’s father Daniel Riley before their son was born, said she suffered from low self-esteem after becoming a mum.
“My confidence was gone. I was overweight,” she continued.
“I would have liked to have had longer than nine weeks off work, but I was a single parent. I was the sole provider at the time, so it was a case of needs must.”