The 21-year-old is expecting her first child with actor husband Doug Hutchison, 56, and admitted overnight her hormones are all over the place.
Alongside a photo of her apparently lounging topless on a sofa, Courtney said: "Pregnancy has got me cranky. Like really cranky. At least right now. Then in an hour I'll be all nice. Hormones be ragin' #pregnant."
Courtney also uploaded a video of her bare baby bump.
Courtney and Doug celebrated their fifth wedding anniversary last month, with a smtten Courtney gushing: "5 years ago I married an incredible man & we are celebrating by renewing our vows in a very special place! Stay tuned."
Their marriage made headlines because Courtney was just 16 at the time and Doug was 51. Their relationship started after they met via an online acting workshop he'd been running. They exchanged emails and Doug said he thought she'd been at least 21 judging by her pictures.
They married with her parents' consent.
Courtney, who appeared in Celebrity Big Brother in 2013, announced in May that she is expecting her first child.
Courtney's most OTT outfits
Copyright: WENN Josiah True