The 33-year-old performer wants a sibling for her 15-month-old daughter Willow Sage Hart, but is due to tour new album The Truth About Love from next February.
Pink told Access Hollywood: "I mean if I weren't going, getting ready to go on tour, I'd be pregnant. I'm barefoot and pregnant in my garden with an attitude."
The singer - who is married to motorcross racer Carey Hart - admitted that her last pregnancy made her angry, comparing her experience to the horror film 28 Days Later.
Pink explained: "They were infected with the rage virus and that's what I had. I didn't battle morning sickness, I didn't have cravings. I had rage!"
The 'Blow Me (One Last Kiss)' singer also said that she is still breastfeeding Willow, and joked that she plans to continue doing so until her daughter is a teenager.
"I'm a hippie at heart. [How long will I do it?] Until prom! I'm going to carry her to prom in a Baby Bjorn. 'Willow, your feet are dragging'," she quipped.
Pink also praised Hart's abilities as a father, saying: "He's amazing. He's exactly the dad I thought he'd be. He was raised by a single dad, so he's completely capable.
"Sometimes I feel like if I didn't have the boob, I wouldn't be necessary!"
Watch Pink's music video for 'Blow Me (One Last Kiss)' below: