Bobbi Kristina Brown may have been 'getting high' after funeral,

Just hours after her mother’s body was laid to rest, Bobbi Kristina Brown was reportedly dealing with her grief in an unhealthy way: by getting high.

According to the Daily Beast, Whitney Houston’s only daughter, 18, was nowhere to be found Sunday morning, the day the late singer’s body was scheduled for burial in Fairview Cemetery in New Jersey.

“Everyone was freaking out and calling Bobbi Kristina’s cell,” a source and longtime family friend told the Daily Beast. “It was so much commotion and activity after the funeral that Bobbi Kristina just slipped away.

Ms. Cissy (Houston’s mother) was beside herself.”

A Houston family spokesperson later remarked that Bobbi Kristina simply “needed some time alone."

After the burial Sunday, however, sources told the Daily Beast that Bobbi Kristina was found in a hotel “getting high.”

It’s a horrible situation for everybody,” a close family friend told the website. “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.”

According to TMZ, Bobbi Kristina has struggled with substance-abuse issues for three or four years now, and her family is eager to get her into rehab.

At the funeral services Saturday, Bobbi Kristina reportedly “broke down” during the ceremony, but did “pretty good, all considering,” a mourner told People.

It was really beautiful ... a lot of people were crying.”