Jack Osbourne Diagnosed with Multiple Sclerosis

Jack Osbourne just celebrated the birth of his daughter Pearl, but now the socialite has a new battle on his hands.

Osbourne,26, has been diagnosed with multiple sclerosis.  Osbourne and his mother Sharon sat down with PEOPLE magazine exclusively to discuss how he’s been feeling since his diagnosis.

Apparently, Osbourne learned he had MS just two weeks after Pearl’s arrival.

“I was just angry and frustrated and kept thinking, ‘Why now?’ ” Jack tells PEOPLE. “I’ve got a family and that’s what’s supposed to be the most important thing.”

Jack Osbourne’s full-interview with PEOPLE can be found in the new issue, on newsstands now.