Adele opened up about parenting, her struggle with postpartum depression and alcohol use in a new interview.

The 28-year-old singer told Vanity Fair she made what she called "the worst decision" of her life after having her son, Angelo, who's now 4. She says she eventually had to spend some time alone in order to overcome her postpartum depression.

"My knowledge of postpartum—or post-natal, as we call it in England—is that you don't want to be with your child; you're worried you might hurt your child; you're worried you weren't doing a good job," Adele said. "But I was obsessed with my child. I felt very inadequate; I felt like I'd made the worst decision of my life."

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Now, Adele calls her son the center of her world. "I don't care if I don't ever get to do anything for myself again."

The British star also touched on cutting back on her drinking and quitting smoking. She says "having a hangover with a child is torture." She says she used to be a "massive drinker," but now only indulges in two glasses of wine a week.

"Since I've had my baby, I'm not as carefree as I used to be. I'm scared of a lot of things now because I don't want to die; I want to be around for my kid. I'm very cautious."

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The comments are in the December issue of Vanity Fair, which hits newsstands Thursday.

Adele wraps up a nearly yearlong tour of Europe and North America on Nov. 21.

The Associated Press contributed to this report.