Her brother Jonathan told the Belfast Telegraph what had happened in a desperate bid to save other teenagers from bottling up their problems and resorting to suicide.

He said Naomi's devastated family had no idea anything was amiss and appealed to other teenagers to confide in their family if anything was wrong.

Friends and family will say their sad farewells to the Dromore schoolgirl at her funeral on Friday.

A post-mortem examination was carried out yesterday after Naomi was found dead in her bed on her 15th birthday on Tuesday, but her family said the coroner's report is not expected for weeks.

Her grieving brother Jonathan said Naomi took her own life by overdosing on painkillers.

She had been looking forward to seeing rapper 50 Cent in concert on her birthday on Tuesday and was making plans to celebrate by go-karting this weekend, he said.

"Everything was fine, everything was brilliant. She was talking about what she was doing this weekend and everything," he told the Belfast Telegraph.

"We had no inkling that it was going to happen. She will be dearly missed by her family."

Jonathan described his sister as a bubbly girl who enjoyed life.

"She loved motorbikes, loved cars, loved playing hockey and her Girls Brigade. Her hero was Valentino Rossi. She was into the stock cars up at Nutt's Corner," he said.

Naomi's uncle Hamilton Wilson said he was hoping parents would show her story to their children.

"If the story helps to save one of their lives, it's going to be a good thing," he said.

"If there is any wrong at all, talk to someone. Nothing's insurmountable, it doesn't matter what it is. Anything can be turned around somehow.

"She was a lovely bright, bubbly girl - everyone loved her and everyone enjoyed her company."

John Wilkinson, principal of Dromore High School, yesterday led warm tributes to Naomi.

"This school has lost one of the most lively and trustworthy young people. She was engaged to the full in the life of the school and she was well-liked by all," he said.

Naomi is survived by her parents David Wilson and Belinda Orr, brother Jonathan, sister-in-law Nikella Wilson, nephew Jake and niece Natasha.

Her funeral will take place at the Church of Ireland Cathedral in Dromore this Friday.

Where to turn for help

Samaritans, 08457 909090

Zest (suicide and self harm), 028 7126 6999

Youth suicide helpline, 0808 8088000