I know no one can really tell me, but can anyone tell me what should be expected at this stage?
My Dad is 79 and until 6 months ago was very fit and active. Long walks, digging the garden, never really stopped.
Then he started feeling unwell and had some stomach problems. The stomach turned out to be easily fixable, but they found prostate cancer during the investigations. Apparently quite advanced and spread outside the prostate itself. They were concerned at one point that it had gone to the bones but it hasn't.
Scan revealed some "tiny" nodules on the lungs which are not being treated as concerning, but are being monitored. He had a further chest scan about 3 weeks ago, but has heard nothing yet.
He's been treated with hormone injections which are giving him hot flushes. He's making a lot of fuss about that - menopausal me has limited sympathy 
He has 5 weeks of radio therapy which ended 6 weeks ago. PSA is now down to 0.1 which is excellent news.
He is very tired and breathless still, can't walk more than a few hundred yards, needs a nap in the afternoon and he was always so fit. Doctor has told him that's the body recovering from the radio therapy, but there's the lung thing at the back of my mind.
So how long does it take to feel fully well after radio therapy, assuming it's done what it should and there are no other issues?