(CNN) Jessica Simpson has written a memoir titled "Open Book," in which she reveals a struggle with alcohol and pills that led her to believe she was killing herself.

Excerpted in this week's People magazine, Simpson says in the book she began self-medicating with alcohol and pills after dealing with the pain of being sexually abused as a young girl. Career pressures added to the stress, which led her to tell a doctor she was in trouble.

"I was killing myself with all the drinking and pills," she writes, adding that she got sober in November 2017 and hasn't had a drink since. "Giving up the alcohol was easy. I was mad at that bottle. At how it allowed me to stay complacent and numb."

She writes about going to therapy and allowing herself to talk about her childhood traumas.

When she was 6 years old, Simpson writes, "I shared a bed with the daughter of a family friend. It would start with tickling my back and then go into things that were extremely uncomfortable."

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