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Vera Farmiga may have snagged a Best Supporting Actress Oscar nomination for her role in Up in the Air, but she still wonders if it was worth it.

Why? The actress, 36, gave birth to her son, Fynn, now 1, two weeks before she had to start filming.

"I could never reclaim these first precious moments of maternity," she tells USA Today. "[But] I needed to pay my mortgage. It wasn't an option. I had to do the role."

Not only that, Farmiga was nervous about having to seduce George Clooney when she was nursing and struggling to drop post-pregnancy weight.

"It was strange having to portray that frank sexuality when I did not feel sexy in the least bit," Farmiga says. "But that's what I loved about her. I loved how daring she was. She makes sex, on screen, fun. She was curious and was gliding through life with grace and a sense of humor, and wit and self-possession and open-heartedness and femininity and sensuality and sexuality."

Critics have praised her work, and Farmiga just hopes it means the studio doesn't regret casting her -- a fear she had while meeting with executives throughout her pregnancy.

"We met when I was four months pregnant, six months pregnant, eight months pregnant," Farmiga says. "The studio was panicking. I felt that. And it destroyed me. I wanted to walk away from this career. I felt incredibly insecure."