The lengthy poem, entitled "For Bronson", detailed a volatile and violent relationship that she feared could lead to death.
"The man I want was the man I had. He made me happy but loved to make me sad. Dreams of shadows becoming clear, The man of my dreams is my biggest fear," the poem began.
Ms Schilling claimed: "The man I had has changed me".
"I ask myself: Was it all worth it in the end?," it read.
Going on to detail being thrown on the floor and being looked at "from behind a gun", Ms Schilling accompanied her lengthy poem with a chilling note, according to Ms Markwell Mobbs's post.
"I'm sorry to be so negative but I want everyone to know that if I get hurt or die Bronson Ellery is responsible," she wrote.
Ms Schilling had also encouraged others in violent relationships to "speak up".
"To all the girls suffering from domestic violence please speak up. Be brave because at any moment anything can happen," the post her mother shared said.
Detectives and forensic officers are continuing to scour the grisly scene and examine CCTV footage of the surrounding areas as they investigate the deaths.
A friend of Mr Ellery, who was due to catch up with the aspiring muso last week told the Gold Coast Bulletin the pair's deaths seemed more like murder than murder-suicide, and suggested the Ms Schilling's killing may not have been part of the plan.
"He went off the grid to his mates, then she went missing, then they both end up dead. It's not right," he said.
"This is sounding more like revenge or a hit type of death and she got in the way maybe and they took out a witness. It doesn't add up."
Another friend said they believed the pairs' deaths were not at the hands of each other.
"Someone out there knows what happened. If it looked like a murder-suicide someone made it looked that way," one friend said.
A post mortem examination is expected to be held today.