A source tells US Weekly, 'Amber has been feeling sick lately, but she's really, really happy!'
The happy couple made their red carpet debut together in August at the MTV Video Music Awards in LA and gushed about their romance.
Telling a US interviewer, 'We're just going slow and we're just trying to be smart about everything, which is good to find somebody on your level like that.'
The couple met when Portwood was filming Marriage Boot Camp with ex-fiance Matt Baier. Glennon worked on the show and reached out to Portwood after production was finished.
The MTV star, who was first featured on16 and Pregnant in 2009, is already a mum to daughter Leah, 8, with ex-fiance Gary Shirley. The former couple now share joint custody of Leah, but had previously battled over how much time Portwood got to spend with her, as documented on MTV's Teen Mom OG.
Gary had primary custody of Leah after the reality personality was sentenced to five years in jail in 2012 on drug possession charges stemming from a 2011 arrest. She was released after serving 17 months due in part to good behavior.
The reality star was also engaged to ex Matt Baier.