'Teen Mom' Catelynn Lowell Pregnant With Baby No. 3 After Miscarriage & Mental Health Struggle

After an extremely difficult few years of miscarriages, mental health struggles and rehab, Teen Mom OG star Catelynn Lowell is pregnant with her third child, RadarOnline.com can confirm.

“The big news is that we are expecting our rainbow baby. This baby is our rainbow after the storm. I’m super excited," the mom of Novalee, 3, and Carly, 9 — whom she placed for adoption immediately after her birth — told Us Weekly in an interview.

“It was a huge shock at first. We were not planning it, especially after the miscarriage and how I went downhill with my mental illness.”

Lowell, 26, said she and husband Tyler Baltierra were "using protection" — but became pregnant anyway.

“We were going to wait a really long time. We were using protection and everything and still got pregnant," she continued. "This baby just wanted to be here. It was very unexpected.”

Lowell and Baltierra, 26, first hinted about the pregnancy last month in a cryptic Instagram post.

"Can't wait to share our big news with y'all!" she posted in August.

Earlier this year, RadarOnline.com reported the couple was suffering marital problems after the reality TV mom returned to rehab to deal with her miscarriage and ongoing postpartum depression.

But it looks like the pair is on the mend — and Nova will be a big sister!