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Vanessa Lachey tweeted a new photo of her adorable son Camden the other day, and the new mom also opened up about some of the things she's learned since giving birth two months ago.

Vanessa and hubby Nick both celebrated their birthdays on Friday (she turned 32, he turned 39), and while the two have embraced parenthood, there are some downsides to having a newborn baby. "I haven't slept since September 12," Vanessa told Us Weekly. "It takes so long to feed and change and swaddle him. But it's worth it!"

When asked about some of the problems she's encountered with her two-month-old, Vanessa says, "His first blowout, I made two rookie mistakes: No. 1, I didn't put a diaper underneath the old one, and No. 2, I didn't let him finish. Nick and I laughed ourselves to tears." Eww! But I guess it is pretty funny...

So how often does Nick take on diaper duty? "He's the best! I'm really lucky. He changes them a lot," she says. "Since I nurse, Nick sees that as his bonding time. He'll talk and sing to him while doing it." She IS really lucky!