It's a terrifying experience for new parents.

Jennifer Lopez was petrified when she saw a strange swelling on Emme's head. She discovered it a few days after she gave birth to twins Max and Emme in Feb. 2008.

"I just remember that feeling, 'If something is wrong with that baby . . . I'm gonna die,'" Lopez told Alina Cho from CNN's "Big Stars Big Giving," that will be specially aired on the next weekend.

The singer, American Idol critic, actress confesses during an interview that she's at a loss with her husband Marc Anthony (they declared their split last July this year).

"I remember looking at Marcand 'We should call the doctor' . . . I started panicking a little bit. Anthony was panicking too."

"We were thinking, 'Did somebody drop her when we weren't looking? . . . I just remember looking at him and saying if this baby, if Emme's not going to be OK . . . I'm not going to be OK," said Lopez.

Anthony, 43, was frightened. "He's like, 'I'm not going to be OK. None of us are going to be OK."

The couple quickly brought Emme to the hospital. "Luckily for us, it turned out OK," she said.

The incident has triggered some thoughts to the star. "I was (thinking) like what if I didn't have that? What if I didn't have access to great health care?" she contemplates. "What if I was a mom just sitting there and there was something wrong with my baby and there was nothing I could do about it?"

Jennifer Lopez and Marc Anthony then established the Maribel Foundation - named after Maribel, Anthony's sister who suffered brain cancer and died at 8 years old - that offers support to children who needs pediatric care.