WHITNEY’S DAUGHTER RUSHED TO E.R. — TWICE!

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Grief-stricken BOBBI KRISTINA BROWN — daughter of WHITNEY HOUSTON and BOBBY BROWN — has been taken to the hospital twice since learning of her mother's death Saturday afternoon.

Paramedics say they took Bobbi Kristina, 18, to Cedars-Sinai Medical Center in Los Angeles on Sunday from the Beverly Hills Hilton. That was after she had already been treated Saturday evening, according to reports.

A family source tells RadarOnline.com, "She tried to ease the pain of losing her mother by having a few alcoholic drinks. She was distraught, on the verge of a complete breakdown. Not knowing what to do, members of her mother's entourage tried to calm her down with a sedative. The two were an unfortunate mix and she ended up passing out."

No other details have been released about Bobbi Kristina's condition. Meanwhile, Whitney's body has been taken to the coroner's office for an autopsy. She was found lifeless in a bathtub at the Beverly Hills Hilton yesterday just hours before she was scheduled to attend CLIVE DAVIS' Grammy party.