Angelina Jolie is reportedly suffering from postpartum depression. The 'Wanted' actress - who has six children with partner Brad Pitt - is said to be having severe "mood swings" and is finding it hard to cope after her newborn twins Vivienne Marcheline and Knox Leon were diagnosed with colic, a common condition where babies cry excessively for no apparent reason.Sponsored Links: A source said: "Angelina slips into depression mode all the time. She has been trying to control her emotions around her older children but her mood swings have been hard on the entire family. "She has been staying in bed most of the time, all she does is sleep. She has little energy and has to force herself to remember to eat because she is still breast feeding. She cries at the drop of a hat and laughs at inappropriate times."Sponsored Links: Following the birth of the twins in July, Angelina has stayed in the family's Chateau Miraval in Provence, France, and is reportedly angry at Brad for attending Italy's Venice International Film Festival to promote his new movie 'Burn After Reading'. The source added to In Touch Weekly magazine: "Angelina feels that Brad has it easy. He had the kids without the pain of birth, and he can just jet off whenever he feels like it."