Sheldon,
I am also 8 months post radiation. I didn't have the same energy level for about 6 months post treatment. I'm sure everyone is different. I pushed myself back to the gym about at 10 weeks and that helped. I felt better about myself and over the next 3 months built my strength back. The recent issues you've had may be the medicine. I kept in close touch with the Doctor for feedback on any symptoms. For me, the multiple medicines (pain, salagen, nausea) all created stomach problems, that only stopped when I went cold turkey. There were still ups and downs. Intermittant pain, stinging sensations in my neck, etc - I think you said it best - post radiation sucks. Taste is getting better, as is everything else. It was (and is) an ongoing process. Best wishes.. Bob