On Valentine’s Day, 16-year-old Naveah was crammed into a closet with her fellow high school students for two hours, hiding from alleged gunman Nikolas Cruz. Cruz is accused of using an AR-15 assault rifle to spray the Marjory Stoneman Douglas High School in Parkland, Florida with bullets, killing 17 kids and teachers.

TELL DR. PHIL YOUR STORY: Have a story in the news?

Naveah’s father, Robert, describes what it was like receiving a text message from his daughter telling him that there were gunshots at her school.

“I told her, ‘Naveah, you just keep texting me every 30 seconds. Just keep texting me,’” Robert tells Dr. Phil during Thursday’s show. He says at one point, Naveah’s text stopped coming for as long as five minutes. “As a father, as a parent, it was the worst nightmare ever.”

WATCH: Teens Describe What It Was Like During The Mass Shooting At Their Florida High School

In the video above, hear more from Robert and Naveah, who knew four of the victims. Hear how she was rescued and taken to safety. And on Thursday, other students at the school share what they experienced during the mass shooting. Check here to see where you can watch.

TELL DR. PHIL YOUR STORY: I'm Living A Nightmare!

‘There’s No Words To Describe The Feeling Never Seeing Your Friends Again,’ Says Survivor Of Florida High School Mass Shooting