Denise Clark, 34, said her life was made "absolute hell" for two years after she was given the wrong prognosis at Aberdeen Royal Infirmary.
She spent £10,000 on alternative therapy at a clinic in Spain in the hope it would prolong her life.
The mother-of-two wanted to spend as many precious moments with her family as she could because she believed she was going to die.
Surpised at how well she was feeling, Denise eventually demanded another scan,which showed that the growth in her pelvis was not malignant at all.
Now the mum has settled a claim for a high five-figure sum after she raised proceedings against NHS Grampian. Ms Clark, of Aberdeen, said she hoped no-one else would endure the nightmare she and her family went through. She said: "I planned my funeral and wrote farewell notes to my boys, Harvey and Luca. It was heartbreaking.
"Hearing them say it was a mistake was amazing and there is a future now, but it doesn't give me or my kids back the two years of our lives that were made absolute hell."
The distraught mum's ordeal began when she was diagnosed with cervical cancer in 2009 while she was pregnant. Although radiotherapy and chemotherapy treatment appeared to be successful she began to experience more bleeding on November 28, 2011 and was told it was caused by a huge mass in her pelvis and the cancer was back.
She said: "I didn't know if I was going to end up dying in a hospital or if I would be at home or how it would actually happen. I wanted the boys to have fun times and lots of mum memories, like playing football or having a barbecue."
Specialists eventually informed Denise that her recurring health problems were caused by internal damage due to the high levels of radiation that she had been given.
NHS Grampian refused to comment on the case.