Demi Lovato is ready to share her story about her 2018 overdose.

In an emotional trailer for Demi Lovato: Dancing with the Devil, Lovato gets candid about relapsing and suffering a drug overdose nearly three years ago. “I had three strokes. I had a heart attack,” she says in the trailer. “My doctors said that I had five to ten more minutes.”

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At the documentary’s Television Critics Association panel held yesterday, the “Confident” singer further elaborated on the toll that experience had taken on her body. “I was left with brain damage, and I still deal with the effects of that today. I don’t drive a car, because I have blind spots on my vision,” Lovato said, per People. “And I also for a long time had a really hard time reading. It was a big deal when I was able to read out of a book, which was like two months later because my vision was so blurry.”

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She also said that the terrifying experience serves as a reminder to stay sober. “I dealt with a lot of the repercussions and I feel like they are still there to remind me of what could happen if I ever get into a dark place again,” she said. “I’m grateful for those reminders, but I’m so grateful that I was someone that didn’t have to do a lot of rehabbing. The rehabbing came on the emotional side.”

The YouTube Originals four-part documentary premieres on March 23.

This article originally appeared on Harper’s BAZAAR US