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An expectant Kim Kardashian attended the Hype Energy Drinks U.S. Launch on Tuesday (June 2) in Nashville, Tenn.

At three months along, the mom-to-be, 34, rocked a flesh-colored pleather sheath with a plunging neckline and stilettos.

“I hate the way I look in flats but heels can be hard during pregnancy,” the KUWTK star told PEOPLE at the event. “I’m already thinking, ‘What am I going to do?’ That’s the hardest thing in pregnancy when it comes to style.’ ”

The reality star also talked about staying healthy during her second pregnancy.

“I’m not looking to keep up that pre-pregnancy energy level this time. I think you need to go with being tired, with what your body tells you, and rest when you need to. I’m at that stage of pregnancy where everything is making me sick, even just the smell of things,” Kim shared. “But once I get past that, I’m really going to try to enjoy this pregnancy more and relax with it. And skip the donuts! With my first pregnancy I had a donut every morning. That’s not a good idea. I feel like I’m eating much healthier this time.”

According to a source, Kim and her husband Kanye West – who are already parents to 23-month-old daughter North – used in vitro fertilization to conceive this time around.

“Kim also had three surgeries to repair her uterus,” the insider told PEOPLE. “The inner lining had been so damaged that she was told conceiving on her own wasn’t possible.”

Reportedly, the reality star had IVF treatment with hormones four months ago, which didn’t take.

The next month, the couple conceived using IVF, but on Kim’s natural cycle, without hormones.

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Hype Energy Drinks U.S. Launch
Hype Energy Drinks U.S. Launch
Hype Energy Drinks U.S. Launch
Hype Energy Drinks U.S. Launch

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