updated 09/18/2012 AT 1:00 PM ET
•originally published 09/18/2012 AT 2:05 PM ET
Robin Roberts is doing her best to stay strong.
“The start of last week went well, but the daily chemo/treatment caught up to me by the weekend,” she wrote in her Robin’s Journey blog on Tuesday. “My body is so weak, but not my mind. YOU give me the courage to keep going.”