But went Bobbi was gone for several hours, family got very concerned (as she'd already had two breakdowns). 

“Everyone was freaking out and calling Bobbi Kristina’s cell,” said one source.  "It was so much commotion and activity after the funeral that Bobbi Kristina just slipped away. Ms. Cissy [Houston, Whitney’s mother] was beside herself.”

The main point of tension is that Bobbi Kris may have a serious drug problem herself.

"Cissy and others won’t admit out loud that Bobbi Kristina has a drug problem,” said the family friend. “But they know it and have been trying to keep her straight even before Whitney passed. But losing your mother and the life you’re accustomed to all in one day is enough to send anybody off the deep end.”

“It’s a horrible situation for everybody,” says the close family friend. “They tried to save Whitney, and it didn’t work. Now with Bobbi Kristina, they fear the same thing is happening again and they won’t be able to stop it either. Bobbi Kristina is all Ms. Cissy has left of Whitney. She’s so tired, but she’s ready to fight again to save her grandbaby.”

Despite the two sources, however, a Houston family spokesperson would not confirm the story saying,

"There was some confusion about Bobbi Kristina’s whereabouts last night for a short time, but she's OK. She needed some time alone.  She is going through a very hard time as you can expect.”