updated 12/05/2013 AT 12:00 PM ET
•originally published 12/05/2013 AT 12:05 PM ET
Exactly three weeks after her double mastectomy, Amy Robach returned to Good Morning America on Thursday to give thanks and speak candidly about her cancer ordeal.
“I am feeling really good,” the 40-year-old mother of two told GMA colleagues Robin Roberts, George Stephanopoulos and Josh Elliot. “Physically I feel remarkably well. Mentally, it’s another challenge.”
Robach’s breast-cancer diagnosis came after she took an on-air mammogram for the show’s October Pink Initiative. The discovery shocked the correspondent, who has no family history of breast cancer.
She quickly decided to have a double mastectomy, and doctors ultimately discovered the cancer had spread to at least one lymph node. Robach, who is married to actor Andrew Shue, will begin chemotherapy Dec. 16.
Throughout her homecoming appearance, Roberts credited cancer survivor Roberts as a role model for facing her continuing health battle with a positive outlook.
“I’m going to work through it,” Robach says. “I saw Robin do it. I know how strong you were. And you give me strength, Robin, because it is important to get up and have something to do each day … even if you feel crappy.”
Robach refers to her successful surgery as “step one” in her recovery journey, but knows that “the next couple of ones are going to be tougher” and knows the mental toll will likely be harder than the physical one.