Kailyn Lowry is facing stress as she prepares to welcome her third child as a single mom.

After confirming news of her pregnancy in February and revealing Chris Lopez as her baby daddy in May, the Teen Mom 2 star is reportedly feeling overwhelmed as she juggles her baby preparations with the parenting of her two oldest children, seven-year-old Isaac and three-year-old Lincoln.

"Kailyn [Lowry] is all over the place right now," a source close to the 25-year-old reality star told Hollywood Life on Saturday. "She's battling the stress of dealing with all the preparations for the new baby, as well as looking after Isaac and Lincoln, all while attempting to ready herself mentally to go through this birth without a partner. As any mom knows, it's scary enough of an experience when you have your other half there with you, but this time Kailyn won't have that, and the reality of the situation is finally starting to sink in."

Lowry and Lopez were involved in a short-lived romance after the reality star split from her ex-husband, Javi Marroquin, in May of last year. However, now they are completely estranged.

"As far as Kailyn is aware, Chris [Lopez] wants nothing to do with the baby and doesn't want [to have] any part in its life - period," the insider said. "It's all so distressing for Kailyn, and her hormones are all over the place right now, which just makes it all the harder to deal with. Previously, Kailyn was in serious nesting mode at this stage of the pregnancies, excited about the new arrival and what the next chapter would bring - it was her favorite part of being pregnant, and some of her happiest times. But this time she's just full of anxiety and worry."

Kailyn Lowry and her co-stars will return to MTV for Teen Mom 2 season eight on July 17 at 9 p.m. on MTV.

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Kailyn Lowry, Teen Mom 2, MTV, Reality TV