Backache? No. Pregnancy? Yes.

A 24-year-old woman went to the hospital with a backache.

Just six hours later, she was giving birth to a baby.

As it turned out, she was pregnant with a baby who was already five weeks overdue.

Kayleigh Renwick, the unsuspecting mother, was never aware of her pregnancy.

She continued to have periods.

"You read about women not realizing they were pregnant and think 'How does she not know?' but some things do happen. You never know,” said Renwick, a childcare nurse from the U.K., according to ChronicleLive.co.uk.

The baby, Lucy, now six months old, has been diagnosed with severe Flat Head Syndrome.

The condition might change the baby's facial features: Unevenly aligned ears and eyes, and jutting forehead.

The condition is generally classified as a cosmetic problem.

It is usually caused by a baby's sleeping position.

In this case, abnormal and prolonged pressure disfigured Lucy's soft skull bones.

The baby was positioned flat at the back of the mother’s womb.

That’s why Renwick was suffering from a terrible backache, said the doctors.