Kristin Cavallari Reflects on Her Pregnancy, Admits She Can't Believe Baby No. 3 Will Arrive in a Few Short Weeks

"I owe so much to my babies," the MTV reality star writes on Instagram

Kristin Cavallari's due date is just around the corner!

The former star of MTV's Laguna Beach and The Hills is expecting her third child with Chicago Bears quarterback Jay Cutler, and on Wednesday, she posted a black and white Instagram picture of herself cradling her baby bump. Kristin, who is mom to sons Camden Cutler, 2, and Jaxon Cutler, 17 months, reflected on her pregnancy, writing, "It's hard to believe I will be a mom of 3 in just a few short weeks. I owe so much to my babies...They have changed me in so many ways for the better." The savvy mom-to-be also plugged her upcoming book, writing, "I talk about my journey to mommy-hood, my pregnancies, and how these little guys have made me who I am today in #BalancingInHeels . The mommy and wife chapters are incredibly raw and real."

"I don't sugarcoat anything," she added. "I can't wait for u guys to read it!"

Kristin began writing Balancing in Heels before getting pregnant with a daughter. When she broke the news about her latest business endeavor to E! News in January, she said, "It's basically an intimate look at my life. It's going to be a lot of fashion and beauty. Because I'm such a big health nut, it's also going to be health and fitness, and then a lot of recipes because I love to cook, and a lot of mommy and wife stuff. So, really just everything in my life...I think it's just a great way for my fans to connect with me."

Kristin, who designs a successful shoe line for Chinese Laundry, said she came up with the title Balancing in Heels because she has "a lot going on" at home and at work. "Being a mom and a wife are of course my top priorities, but then with the shoes and the jewelry and working and everything else, it is hard to balance it all," she said. "It's sort of how I try to do that anyways."

Balancing in Heels will be available in 2016.

Before the reality star's book is published, though, Kristin has said she wants to enjoy her last few weeks of being pregnant. "Gonna try and really enjoy these last few weeks dressing the bump since I always miss it when it's gone," she told her Instagram followers earlier this week.