Robin Roberts and Elizabeth Edwards
JOHN KRONDES/GLOBE; Paul Hawthorne/Startraks
Addressing a group of cancer survivors and activists at a fundraiser in Biloxi, Miss., on Wednesday, Good Morning America
anchor Robin Roberts said "it was like the weight of the world was lifted" when she made her on-air disclosure about her diagnosis for breast cancer.
"The worst days were the days before I made the announcement because people were writing and saying 'something is wrong.' But once I made the announcement it was like, I'm not hiding anymore," said Roberts, 46.
Just one hour after making the announcement, Roberts received a call from Elizabeth Edwards – who is also fighting
"That conversation was so enlightening, so comforting, her words, her experiences, the fact that she took the time," Roberts told PEOPLE. "She knew how difficult it was to make it public."
her diagnosis on GMA
on July 31 and underwent surgery
on Aug. 3. She is now working with doctors to decide on further treatment
, which she expects to begin in mid-September.
Meanwhile, Roberts continues to work at full speed and has been in the Gulf Coast region reporting on the two-year anniversary of Hurricane Katrina.
"It was therapeutic for me to put my focus on something else," she told PEOPLE.
She also says that she's spending more time than usual with her family – her mother, two older sisters and an older brother – as she recovers. "It's really neat because I feel like the baby again," she says.