As Paris Hilton readies for her upcoming YouTube special “This Is Paris” this fall, the Hilton hotel heiress reveals that she still has nightmares because of a traumatic experience that happened to her as a teenager.

In a clip from the documentary Paris says, “I’m nervous. I’m shaking. It’s hard to even eat, because my stomach is just like, turning. I don’t know—it’s something that’s very personal and not something I like talking about. No one really knows who I am. Something happened in my childhood that I’ve never talked about with anyone. I still have nightmares about it.”

Paris describes filming the YouTube documentary as “very therapeutic” for her and says she “learned a lot about herself while making the film.”

The YouTube Originals documentary, “This Is Paris” will debut on September 14th.

Did something happen in your childhood that you struggle to get over? What is stopping you from confronting the trauma? Do you have plans to watch “This Is Paris?”