"It was an amazing feeling, crazy. Literally 48 hours before I started injections. I was pregnant!" she told HELLO! "I had done so many pregnancy tests during the eight months we'd been trying hard for a baby that I fully expected it to come back negative as it always did."
The 37-year-old star tells HELLO! how she and her husband Ben Stacey turned to IVF after months of trying to conceive and the agony of a miscarriage nine months ago, at the same time that her character Doctor Jac Naylor, was giving birth on screen in the hospital drama.
"God, it was the worst timing because while my character was giving birth, I knew I was pregnant and had this feeling that it was going wrong" she confides, talking about the miscarriage for the first time.
"I certainly blamed myself because you think of all the things you’ve done wrong. As a woman, you feel like you’ve failed. I went down the rabbit-hole, as others do. I felt terribly sorry for myself and it was difficult to pick myself up."
Now Rosie is preparing for the baby's arrival early next year. "This feels completely different to the last pregnancy so I'm more positive about it" she says. She is also looking forward to telling the rest of the cast, especially close friends Bob Barrett and Paul Bradley. "At least they might understand why I've been forgetting my lines and falling asleep on the beds in Darwin ward" she jokes.
READ THE FULL INTERVIEW IN HELLO! - OUT NOW.