A bullet tore into a Bronx apartment, shattering a fourth-floor bedroom window and landing on a teen’s bed — feet away from her brother and 10-year-old sister.

Helen Tzic, 17, had just gotten up from her bed at her family’s Norwood apartment and went to the bathroom when the bullet came crashing in at about 7 a.m. Sunday.

Her 15-year-old brother, Deny, was still in the room.

“I was just on my bed on my phone, and I heard the window shatter, and I was confused,” Deny told The Post. “I saw small pieces of glass on the bed. Then my sister came back and she found the bullet on her bed.

“I’m happy nobody got hurt, but I’m also scared because what if it happens a second time?” he said. “It’s scary. I didn’t know what had hit it.”

Helen said she was equally puzzled when she came out of the bathroom and saw the slug on top of her blanket.

“I’m not really a religious person or anything, but when I was looking for my blanket and saw the bullet I took a second to say, ‘Thank God,’ ” she recalled.

“I wasn’t there at that moment. It’s really scary to think something bad could’ve happened. It could have been worse.”

The two siblings, who share the bedroom with their mother and 10-year-old sister, said their mom was in the kitchen and the girl was sleeping when the bullet flew in their apartment at East 206th Street and Bainbridge Avenue.

Their mom, Rosa Tzoc, who spells her surname differently than her children, was using a blender and did not hear the window shatter.

“I’m trying to figure out how to move the furniture against the window to be safer,” she said. “I’m also starting to look for another apartment in a safer neighborhood. On the weekends, there are too many fights outside.

“My children are good kids,” she said. “They don’t cause any problems. By the grace of God nobody was hurt.”

The NYPD said it was reviewing surveillance video to determine who fired the shot but could not provide more information.

The incident comes on the heels of the death last week of a Queens mother who was hit by a bullet that flew into her apartment.

Bertha Arriaga, 43, was in her Jackson Heights home at around 12:45 a.m. Wednesday when the slug came through a bedroom window and struck her in the neck, police said.

Arriaga’s 14-year-old son found his mother mortally wounded on the floor.

Issam Elabbar, 31, of Queens was arrested on Saturday and charged with murder in the shooting.

On the Fourth of July, a stray bullet zoomed into a girl’s Harlem bedroom, piercing through a door and lodging into a wall, cops said. No one was injured.