EXCLUSIVE: Kristin Cavallari Opens Up About Brother's Death and Scary Car Accident: 'I Have Such an Appreciati

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Kristin Cavallari has certainly had it rough lately, but she's looking on the bright side.

"I'll be honest, getting in this car accident and everything else that's been going on in my life the last few months, I have such an appreciation for life," she told ET's Jennifer Peros at a Wonderful Halos and Boys & Girls Clubs of America event to promote healthy snacking.

The 29-year-old mother of three was rushed to the hospital after a car accident in January, just a month after her brother, Michael, went missing and was ultimately found dead in Utah.

"I'm just grateful for everyone and everything in my life," Cavallari said. "This car accident could have been so much worse. It was extremely scary...[but] my arm's not broken. I can still function, and none of my kids were with me."

NEWS: Kristin Cavallari Couldn't Hold Baby Saylor for a Week After Car Accident

The accident -- Cavallari says it was the first wreck she has ever been in -- occurred on Jan. 21, after she was cut off by another vehicle. The former reality star was taken from the scene on a stretcher and learned that she had dislocated her elbow.

"I didn't black out, but I definitely think I went into shock a little bit. I couldn't move my arm, it was like, dangling in my lap. I was for sure I broke it," she recalled. "I managed to call my husband and I was like, 'I broke my arm! You have to come right away!'"

Still, her injury prevented her from holding 2-month-old daughter Saylor for a week, and her husband, Chicago Bears quarterback Jay Cutler, even had to help her nurse.

"My husband, poor thing, had to actually help me breastfeed," Cavallari revealed. "So, he was putting Saylor up to my boob and I could get one arm around her. But she's a newborn, she can't even hold up her own head, so it’s not like I could prop her up on my hip."

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Now that the accident is behind her, the one-time Laguna Beach star is happily back to full-time mommy duties.

"Saylor is a rockstar! She's my best baby," she said of her newborn, whom the couple welcomed on Nov. 23. "It might be because she's my third and I knew what to do and expect and I'm so confident now, but she's so easygoing and she’s my best sleeper...My middle child, Jaxon, was a tough baby. So, I feel like we paid our dues with him."

Cavallari told us that her oldest child, 3-year-old Camden, immediately fell in love with his sister "from day one," while 1-year-old Jaxon took a bit of time to warm up to her. "It's fun having a little girl," she said. "It's different. People, the whole time I was pregnant, said it was going to be different and I didn't really believe them."

"There is something about it. Your little girl is your girl!" she continued. "I have such a great relationship with my mom, that I'm really looking forward to having that with my daughter as well."

As for if there will be any more additions to their family? Cavallari quickly shut it down, declaring with a laugh, "We’re done! Three is the max!"

Meanwhile, Vanessa Hudgens wants to thanks fans for supporting her in Grease: Live. The actress' father passed away shortly before the show and she dedicated her performance to him.