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See why ​Caitlyn Jenner can't sleep in new "I Am Cait" clip

Caitlyn Jenner goes without makeup and reveals she's had a hard time sleeping in a new clip for "I Am Cait," which debuted Thursday ahead of Sunday's premiere.

"It's 4:32 in the morning, and I can't sleep," she says.

The 65-year-old former Olympian admits that she stays awake at night thinking about about how to help the transgender community.

"I feel bad that these [people], especially young people, are going through such a difficult time in their life," Jenner continues. "We don't want people dying over this. We don't want people murdered over this stuff. What a responsibility I have towards this community. Am I going to do everything right? Am I going to say the right things? Do I project the right image? My mind's just spinning with thoughts. I just hope I get it right. I hope I get it right."

In June, Jenner went public with a new female identity and name on the cover of Vanity Fair magazine.

The docu-series premieres on E! this Sunday.

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