How 5-Year-Old Boy Saved Mother's Life When She Passed Out After a Heart Attack

— -- A 5-year-old boy from Kingsport, Tennessee, is being hailed a hero after he recently helped save his mother when she suffered a heart attack.

Melissa Williams, 43, told ABC News today that she had been home alone this past Sunday evening with her son, Tommy Williams, when she began feeling sick and eventually passed out due to a heart attack.

"Tommy then immediately picked up the phone, called dad, who was out getting food, and told him something was wrong and that Mommy wouldn't wake up," Williams said. "Tommy tried to wake me up, but since I didn't, his dad told him to go and get neighbors. Tommy ran down, knocked on their door and they were able to take me to the hospital."

Melissa added, "If it weren't for Tommy, I don't think I would be here today. I don't know when somebody would've come and seen me."

Williams said she underwent a successful cardiac catheterization Sunday night at Holston Valley Medical Center and was released home from the hospital's intensive care unit on Wednesday.

Williams said she and her fiancé, Jonathan Malone, who is Tommy's father, are throwing a celebration party to in honor of Tommy this weekend.

"It's incredible because three years before Tommy was born, I had my tubes stitched and burned on the ends, so when I got pregnant with him, everyone called him a miracle baby," Melissa said. "We always believed he was here for a reason, and I truly believe that reason was this past Sunday night. He's my hero."