My siste ris 5 weeks out of radiation too and is suffering from the depression. I could see it slowly coming on her. She was put on an anti-depressant today and we are hoping to see an improvement. It does break your heart to watch them being so sad. You sit there and flip your mind over and over trying to think of something to help and it is only time and patience that will do. I hope you see a change for the better soon.