Rob Kardashian and Blac Chyna Argue, Cry and Talk Depression in Intense New 'Rob & Chyna' Trailer

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Get ready to witness the ups and downs of Rob Kardashian and Blac Chyna's headline-making relationship.

In an extended look at their new E! reality show, Rob & Chyna, the two air our their personal issues, including getting into explosive arguments over suspicious texts and 29-year-old Rob's reported depression.

"It's a big change, from going inside for, like, four years, to now being outside," Rob admits, referring to his decision to stay out of the spotlight -- and skip important family events -- in recent years.

WATCH: Rob Kardashian Explains Skipping Kim and Kanye West's Lavish Wedding -- 'I Just Wasn't Comfortable'

Rob also starts spending quality time again with his sister Kourtney's ex, Scott Disick, who jokes, "It's almost like he's been in jail."

But Rob's reported depression is no laughing matter, especially when he and Chyna get emotional while butting heads over text messages.

"Why you wanna keep going through my phone, like you don't trust me?" Chyna, 28, asks as Rob questions her about a person who keeps "hitting [her] phone over and over."

The model later has her own doubts about Rob's faithfulness.

"What are you texting other females about?" she asks, before screaming, "I'm not fu**ing playing with you, why the f**k are you still texting b**ches?!"

"The whole arguing is too much," Rob later tells Scott. "She's too hot and I'm too hot."

However, Chyna -- who's currently pregnant with their first child together -- does show sensitivity to Rob's issues.

"What can I do to help? What really triggers you to go into a dark hole?" she asks her fiance.

WATCH: Rob Kardashian Opens Up About His 'Dark Days,' Says the Moment He Met Blac Chyna, He 'Wanted to Be More Than Friends'

Throughout the trailer, the Kardashian family surprisingly acts as the voice of reason for the couple.

"Depression is a serious issue," Rob's sister, Kim, later tells the expectant parents. "What's gonna happen when this baby is born?"

"Everybody argues in a new relationship," Rob's mother, Kris, also at one point calmly tells her only son.

But it's Scott who's most direct. When Rob comments, "We're two different people. I don't expect her to be like me," the father of three shoots back, "I don't even think you know exactly who you are."

WATCH: Blac Chyna Says Her Child With Rob Won't Have a 'K' Name, Calls Ex Tyga 'Kinda Cheap'

Rob & Chyna
premieres on Sept. 11 at 9 p.m. on E!

Rob recently talked about his "dark days" and credited Chyna for helping him through it.

"I wasn't happy in my own skin. I missed out on so many things," he told People. "Chyna definitely motivates me. Being with her got me over the insecurity of being out in public."

Watch below: