“I want to be with him! I want my boy! Oh my God! How could this have happened?”

The Bold and the Beautiful star Hunter Tylo poured out her grief after learning her 19-year-old son was found dead in her swimming pool.

The distraught actress was so traumatized she was put in a 72-hour psychiatric lockdown after kicking at and cracking the window of a police car rushing her to a Los Angeles hospital, The ENQUIRER has learned.

Michael Tylo was found fully clothed in the pool at Hunter’s Las Vegas-area home just before midnight Oct. 18. He is believed to have suffered a seizure before falling into the water, and the Clark County (Nev.) coroner’s office listed his death as an accidental drowning.

“Hunter was absolutely devastated after receiving the phone call that is every parent’s nightmare,” a family friend told The ENQUIRER.

“She practically collapsed. She was sobbing. Someone got through to her therapist, who insisted Hunter admit herself to a hospital.

“When Hunter refused, the therapist did what he felt was a life-saving measure — he called the police.

“Doctors medicated her, and after a few minutes, she calmed down.

“A day later, she was taken to Thalians, the psychiatric ward at Cedars-Sinai Medical Center. She could not stop crying.”

Meanwhile, a coroner’s spokesman confirmed that Michael, who suffered from a seizure disorder, had a convulsion and then fell into the pool. He had no history of drug abuse, but standard procedures call for toxicology tests, and the results should be available within a few weeks.

Pick up the new issue of The ENQUIRER for more dramatic details on Hunter Tylo’s family tragedy.