The 46-year-old singer, who is now dating her fellow "The Voice" coach Blake Shelton, said she lost her way while trying to record album track with her band, No Doubt, in between school runs and family commitments, reported E!Online.
"Getting pregnant, which wasn't planned and was such a miracle, put me in a whole new spiritual place," she said.
"I was trying at the time to do more music with No Doubt. Then I got pregnant, and I was like, 'OK, well what am I gonna do now? I need to make some changes. There's only so much energy'."
"I didn't tour at all, but I did record the No Doubt album, which was super hard. I was torn the whole time. Every day I would take the kids to school, drive to Santa Monica (in California), work on the album, and then I'd think, 'Oh my God, if I don't leave by 2.30, I'm not gonna get home in time for dinner'.