Linda Reeves, a 50 year old mum of nine is convinced she is 15 months pregnant but she has been told by a Doctor that she's 'just fat.'
Linda says she can feel the baby kicking and squirming inside her - despite five scans showing there is nothing there.
But she refuses to give up and is holding out hope doctors will give her a CAT scan.
She said: "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."
Linda, of Milton Keynes, Bucks has carried out her own research into abdominal pregnancies, where the baby grows in a Fallopian tube or a cavity of the abdomen.
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.
She said: "I keep going to my GP and he's agreed a few times to send me for a pregnancy scan.
"But they only scan my womb - so how can they find my baby if it's growing in my abdomen?".
"The doctors won't do it (a CT scan). They've even suggested I have a mental health problem and it's a phantom pregnancy.
"They gave me anti-depressants but I threw the prescription in the bin."
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.
She said: "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."