Why Amber Portwood Changed Her Mind About Having Another Baby

A diagnosis of borderline personality disorder and bipolar disorder meant no more children for Teen Mom OG cast member Amber Portwood.

The 27-year-old had already had her daughter Leah at age 18, but the medication she was on for her mental health would harm a fetus.

But after breaking up with fiancé Matt Baier and meeting current boyfriend Andrew Glennon, Portwood decided she wanted to see if she could thrive without the pills.

Up Next: Amber Portwood Posts First Photo Since Pregnancy Announcement

"I wanted to see if I was just unhappy because of the things that were going on in my life," she told Us Weekly. "I needed to see where I was in my head and it's a beautiful thing because I just feel better. I feel happier and not so depressed."

Weaning herself off the medication was a "rough" but "necessary" step when she and Baier broke up.

"I needed to see where I was in my head and it's a beautiful thing because I just feel better," she said.

Soon after, Portwoord learned she was pregnant with Glennon's child.

"We're both very happy," she gushed. "I feel like it's a new chapter of my life."

"He's already thinking about the future," she added of her cinematographer beau.

It's been years since the mom had a baby in the house, and with the addition of a new family member comes a lot of nerves, she admits.

"I don't know what to expect," she said. "Having a new baby is new likes, new wants, new needs, so it's very nerve-racking."

Teen Mom OG season 7 premieres Nov. 27 at 9 p.m. EST on MTV.