We're still a few months away from Amber Portwood's due date, but the Teen Mom OG star shared a rare baby bump selfies with fans on Instagram. Cradling her growing belly in the photo, Amber also gave her followers a quick pregnancy update.

"Heading to my doctor for a check-up," she captioned the sweet photo. "Can't wait to share my little bundle of joy with you all… sending love always." Watch the video above to see her baby bump today!

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Love my little family🤗💖🤰

A post shared by Amber Leann Portwood (@realamberlportwood1__) on

Amber, 27, announced she was expecting a baby boy with boyfriend Andrew Glennon this past November, and he recently revealed her due date is Mother's Day. "Bomb's Away!" he wrote on social media. "Little James' due date: May 13th, Mother's Day! One day before Amber's actual birthday. She was born on Mother's Day 1990. The stars really aligned on this one."

Baby James will be the second child for Amber, who is already mom to nine-year-old daughter Leah with ex-boyfriend Gary Shirley. However, this update comes amid speculation that Andrew is not the father of Amber's unborn child, but rather her ex-boyfriend Matt Baier. "May 13, 2018, Mothers Day," the TM troll Twitter account Amber Porkwood stated. "New Matt finally confirmed the due date y'all, I've been patiently waiting [because] I'm not a complete butthole. Just half. Now everyone can go see what or who Ambuh [sic] was doing on August 20, 2017."

Amber met Andrew while she was filming Marriage Bootcamp: Reality Stars Family Edition this past summer with her ex, making the timeline a little fuzzy. "My conspiracy theory is that the baby is Matt's. The timing is… odd to say the least. Also makes me wonder if that’s why she had such a hard time dumping him," another individual added. We'll just have to take Amber's word for it.

Teen Mom OG airs Mondays at 9 p.m. EST on MTV. Be sure to join our Teen Mom Facebook group to chat about all the latest updates and juicy gossip!