TEEN Mom 2 star Leah Messer claimed a babysitter sexually abused her when she was just 5 years old.

The Sun can exclusively reveal an excerpt from Leah’s upcoming memoir, Hope, Grace & Faith, where she claimed she was sexually abused for "at least six months."

Leah Messer claimed in her memoir, Hope, Grace & Faith, that she was sexually abused at age 5

Leah, 27, explained how when she was about “five or six,” a teenager helped watch her during her mother’s hospital shifts

At the time she thought the teenager was the “coolest person.”

Leah wrote in the book, which is out May 5: “Sometimes she would chase me and try to kiss me, and I would have to run away and hide. I really wanted her to like me, but at the same time, she made me feel weird and uncomfortable.”

The Teen Mom 2 star then claimed how the babysitter “started laying down” with her during her naps.

Leah alleged her teenage baby sitter sexually abused her for "at least six months"

Leah alleged in the memoir: “She would put on a movie and as soon as her mother left the room, she would kiss my neck and touch me where no one should ever touch a child.

“I didn’t like what she was doing. It felt wrong, but she was the only one in that house that was nice to us. I was afraid that if I told her to stop, she wouldn’t want to hang out and play games anymore.”

Leah wrote in the book the abuse went on for “at least six months" until her family moved to North Carolina.

Leah told no one about the abuse, as she "felt ashamed"

She never told anyone because she “felt ashamed,” like she had “done something wrong.”

She explained: “I stuffed the memory down so deep it was almost as if it never happened. Except that it did, and it became another loose stone in the foundation of my self-worth.

"It took a long time for me to find my voice because I didn’t know how to love myself enough to say no.”

Leah's mom Dawn and her father split when she was young

Also in the memoir, Leah explained how her mom filed for divorce from her dad because of his drug addiction.

They remarried when Leah was “barely two years old.”

They split up for good a few months after Leah’s youngest sibling, Isaac, was born.

Dawn went on to marry Leah’s stepdad, Lee, who has appeared on the MTV series.

Leah claimed she didn’t see her dad “much more,” and saw him again for the first time when she was 10.

Leah is mom to twins Ali and Aleeah, 10, and Addie, 7

The mom of Ali and Aleeah, 10, with ex-husband Corey Simms, and Addie, 7, with ex-spouse Jeremy Calvert, also explained how she moved often as a kid.

Between sixth and seventh grade, she went to three different schools and lived in four or five different homes.

She wrote in her book: “I was totally miserable. The sad thing is, I actually liked school. I loved learning new things and I craved the structure—which I didn’t have at home. I hated always being the new kid.

"Every time I had to start over it chipped away at my self-esteem, and I retreated into myself a little bit more.”

Constantly moving around continued into high school.

Leah revealed in her book that she moved around a lot as a kid

Leah first opened up about her sexual abuse on Instagram live in March.

She said: “They’ll understand the childhood drama and co-dependency in relationships.

“Everything I endured in my childhood from sexual abuse to physical abuse was probably the hardest thing.”

As The Sun previously reported, Leah also opened up in her book about her battle with drugs following a “botched” spinal tap in 2013 during her labor with Addie.

Leah also wrote about her drug use, which was captured for Teen Mom 2 cameras

Leah claimed the hospital gave her painkillers Hydrocodone, Oxycodone and Tylenol 3 for “intense” spinal headaches.

She also took Diazepam for her anxiety, which she wrote “really knocked me out.”

Leah claimed she “blacked out” for years, as she was often filmed slurring her words or falling asleep mid-sentence.

She entered treatment after Teen Mom 2 producers saw GoPro footage of her attempting to commit suicide by driving off a cliff.

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