ANGELINA’S AGONYBy PATRICIA SHIPP

Brad Pitt left Angelina Jolie to face the biggest nightmare of her pregnancy alone and distraught in France.

Sources say the Troy star flew off to New York for a business trip after Angelina learned her mother was losing her battle with uterine cancer!

The Tomb Raider beauty is worried sick that her ailing mother, former actress Marcheline Bertrand, will not live to see the birth of her grandchild.

And sources say Brad couldn’t have picked a worse time to up and leave Paris as Angelina, 30, endures one of the darkest periods of her life.

For more on Angelina, pick up this week’s issue of The National Enquirer.