jamie-lynn-spears_afraid-to-give-birth.jpg 

Mom-to-be Jamie Lynn Spears (pictured here with baby daddy Casey Aldridge) is terrified of giving birth, and her mom, Lynne, isn’t making things any easier.

A source says that when the Spears family matriarch showed her seven-months-pregnant 17-year-old daughter a video of a real natural childbirth, Jamie Lynn threw up!

“Lynne was trying to be helpful,” a source says. “She wanted to show Jamie Lynn what a woman goes through giving birth, that it’s a natural and beautiful thing, but all Jamie Lynn saw was the blood — or ‘goop,’ as she called it — the screaming and the pain. It was too graphic for her. She flipped out and literally got sick.”

Now Jamie Lynn is totally freaked out. “She is wondering if a C-section is possible,” the source adds. “She wants to be knocked out and then wake up when it’s all over.”

She’s 17 and didn’t know what happens during childbirth? Ugh.