According to MirrorUK, Linda Reeves, 50, says she is certain a baby is growing outside her womb as she says she can feel it kicking and squirming.
But despite her strong conviction she's pregnant five scans have shown that there is nothing there.
She said one doctor has even told her she is just 'too fat' and another has said she has a mental health
problem and it's a phantom pregnancy.
But she refuses to give up and is holding out hope doctors will give her a CAT scan.
"Nobody will take me seriously. I've had nine children and I know what it's like to feel a baby inside me.
"I've had all the symptoms of pregnancy - sickness, backache and tiredness. I am absolutely certain that there is a baby there, but it is growing in the wrong place."
One doctor told Linda her 'pregnancy' is simply due to overeating.
"He said I was just too fat. I was furious," she said.
"I may not be the slimmest person in the world but I've actually lost weight because I've been so stressed since all this started in May last year."
Linda says strangers regularly notice her protruding belly and ask when her baby is due.
"When I tell people I've been pregnant for 15 months they don't believe me. I don't blame them."
During a visit to her sister, Linda said she persuaded her sibling's GP to listen into her tummy with a Doppler machine.
"I heard the baby's heartbeat! I know that sound so well, how could I not recognise it," she said.
"If by some chance I am wrong, then I want to know exactly what is happening inside me. What if it's cancer? I have a right to be treated seriously."
The mum, whose children are aged between five and 24, is desperate for a full CT scan to discover exactly what is happening inside her.