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Kim Kardashian has lost 50 pounds since giving birth to North West in June, but she still stings from the attention over her weight.

The reality star appeared on " The Tonight Show with Jay Leno " Wednesday and expressed how much the talk of her weight gain during pregnancy really "hurt my soul."

"It changed me a lot," Kardashian said. "It really did affect me … it changed how I am in the public a little bit. I would go out and there would be photos of me, like anytime I was hungry or I was wanting to eat something. There were these stories where I was like 200 pounds."

See: Photos of Kim Kardashian Through the Years

The newly engaged "Keeping Up With the Kardashians" star, 33, explained that she was gaining weight because she was pregnant, something that's obviously normal and natural.

"It was really hard to read all these stories and hear all these nasty things," she added.

In fact, the time she spent at home after giving birth - not in the public eye - helped Kardashian adjust her life a little to not be so open as she was before, "especially now that I have a daughter," she said.

"I've definitely tried to live more of a private life because of that, because they were so nasty," she said.

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And when asked about that infamous white bikini selfie, showing off a whole lot of booty, Kardashian said that was also connected to the negativity she heard about herself while pregnant.

"I actually just sent that to my boyfriend, [now] my fiance, and I was like, 'Babe, can I post this up? This is like my big middle finger to the world on everyone that called me fat,'" she boasted.

Kardashian has been shedding the pounds in recent months through the Atkins diet and a healthy dose of exercise, including Pilates.