Pregnant Amber Portwood's TERRIFYING Health Crisis Revealed

Amber Portwood's pregnancy hasn't been easy!

In a clip from last night's Teen Mom OG, the expecting mother learns that she has gestational diabetes. The reality star's second baby daddy and boyfriend, Andrew Glennon, helps out by looking into ways to change her diet!

"I can't really enjoy my pregnancy as much," she explains. "Always feeling tired. Always feeling useless."

Watch the the clip above to learn more! Teen Mom OG airs Monday night at 9pm ET, only on MTV!