It wasn't just back pain and it certainly wasn't a kidney stone.

Instead, a doctor informed a Newfoundland woman she was about to deliver a baby, only hours before her Jan. 1 delivery.

Juanita Stead, 36, of Port de Grave, N.L., swears she had no idea she was pregnant because she had none of the usual symptoms.

"I wore my everyday clothes. No sickness. My regular menstrual period every month," she said in a phone interview with CTV's Canada AM on Friday morning.

Stead said her first clue that something was up was when she got a small pain in her back around lunchtime on Dec. 31.

"It was just a little pain in my back and I just ignored it as the day went on," Stead said, when recalling her very memorable end to 2008.

She headed out to a New Year's Eve party at her sister's house, but started to feel steadily worse.

"By 20 after nine that night, I was in complete and utter back pain and my urine, I couldn't even urinate -- I couldn't even do a dribble of pee," she said.

Her brother-in-law, who is a paramedic, told her that it sounded like she might be passing a kidney stone.

That's when the decision was made to take her to Carbonear General Hospital, about 30 kilometres north of her home in Port de Grave.

She went to hospital by ambulance and was accompanied by her brother-in-law and her husband Terry, 35.

In the emergency room, she was put through a barrage of tests as doctors tried to figure out what was going on.

"They done all kinds of tests -- they done blood work and everything else," Stead said.

"They sent me for an X-ray, and when they sent me for an X-ray, the doctors says: 'It's no kidney stone, you got a baby ready to be delivered," she added, saying she was in "complete shock."

At 12:31 a.m. on Jan. 1, Stead gave birth to baby Nicholas who weighed seven pounds and 12 ounces. He was healthy and one of the first babies born in Canada in 2009.

It wasn't the first time Stead had an unexpected delivery.

In July 2006, Stead gave birth to her two-year-old son Cameron in her home bathroom six weeks premature. He weighed only three pounds and 11 ounces.

While Cameron's premature birth brought serious complications, including eventual bowel, liver and pancreas transplants, he is now in good shape.

She told The Canadian Press earlier this week that her two sons are "two little miracles meant to be."

With files from The Canadian Press