Shannen Doherty says she is battling stage 4 breast cancer

Shannen Doherty is battling a recurrence of breast cancer that has progressed to stage four

"I definitely have days where I say, ‘Why me?’ And then I go, ‘Well, why not me? Who else? Who else besides me deserves this?’ None of us do," Doherty told “Good Morning America” on Tuesday. "I don't think I've processed it. It's a bitter pill to swallow in a lot of ways."

"I'd rather people hear it from me. I don't want it to be twisted. I don't want it to be a court document. I want it to be real and authentic," Doherty said. "I want people to know from me, I just didn't want them to know yet."

In a court filing Tuesday, her lawyers argue Doherty has been forced to pay out of pocket for losses she believes should be covered by her insurance policy. "Plaintiff Shannen Doherty is dying of stage 4 terminal cancer. Instead of living out her remaining years peacefully in her home, Ms. Doherty remains displaced and battling with her insurance company," they argue.

Doherty, 48, has been working on the show "BH90210" and kept the diagnosis mostly secret. "People with stage four can work, too. Our life doesn't end the minute we get that diagnosis. We still have some living to do," she said.