Jack,
You might consider an anti-depressant. It should help cut down on the hot flashes and maybe help your mood. My rad onc always offered to give me an anti-depressant script but I decided to forge ahead without it.
I know it is oft repeated here, but, once again, I strongly encourage a good exercise program while on HT. I think it makes a big difference in managing the HT side effects.
Have you had a discussion with a radiation oncologist on salvage radiation, including the the lymph nodes? I would at least discuss it.