Gwen Stefani is opening up and being more candid on her last few years of marriage with Gavin Rossdale, and in the years that led to their heartbreaking divorce.

In an interview for InStyle magazine's December issue, Gwen Stefani shared her daily struggles at the time.

"I didn't tour at all," Gwen said, talking about her last couple years with Gavin Rossdale. She continued:

"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, work on the album, and then I'd think, 'Oh my God, if I don't leave by 2:30, I'm not going to get home in time for dinner. And Gavin being on tour... I'm not going to say there weren't some incredible moments making that album. But it was a lot of knocking my head against the wall. A lot of struggle."

After 13 years of marriage together, it's not surprising that Gwen Stefani is also seeking joint custody of their three sons: 9-year-old Kingston, 6-year-old Zuma, and 1-year-old Apollo.

Speaking of her children, Stefani also opened up about their youngest son, even referring to his birth as a "surprise 'miracle.'" 

Turns out, giving birth to Apollo Rossdale at the tender age of 44 put Stefani in "a whole new spiritual place." She explains:

"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 going to do now? I need to make some changes.' [...] There's only so much energy."

Gwen Stefani net worth is $100 million.

Read more on Gwen Stefani's InStyle interview when the magazines hits newsstands on November 13.