The 27-year-old Teen Mom OG star is pregnant with her new boyfriend Andrew Glennon's baby, Us Weekly reported.
"Amber has been feeling sick lately," a source told Us. "But she's really, really happy!"
Amber and Andrew, a cinematographer, made their red carpet debut together in August 2017 at the MTV Video Music Awards in Los Angeles.
"We're going slow and we're just trying to be smart about everything, which is good to find somebody on your level like that," Amber said at the time.
The pair reportedly met while Amber was filmingMarriage Boot Camp with her ex-fiance, Matt Baier. Andrew apparently worked on the WE tv show and contacted the reality TV star once production on the series wrapped.
"It was definitely butterflies there, but then again, as we started talking, strangely I felt so comfortable, which was amazing," Andrew, who served as a lighting technician, told the magazine during the red carpet appearance. "I feel like that's hard to find."
And Amber agreed, telling Us, "I think we just kind of fell into this groove really enjoying life with each other for a while, so it's kind of fun and it's kind of serious in a way as well. But we're trying not to put too much pressure on a relationship."
Amber first found fame when she starred in an episode of MTV's 16 & Pregnant in 2009. She had welcomed her daughter Leah, now 8, with her ex-fiance Gary Shirley, who shares joint custody of the little girl.
Gary, however, had primary custody of Leah when Amber served 17 months in prison on drug possession charges stemming from a 2011 arrest. She was released for good behavior in November 2013.
Amber reportedly called off her wedding to Matt after he offered her Teen Mom OG co-star Catelynn Lowell a Xanax during an MTV press event in April 2017.
Amber likely found the act to be offensive and problematic since she has been sober for more than five years and is currently living a healthy lifestyle.