I've had radiotherapy, 28 blasts of it plus 2 boosters, following hysterectomy, mastectomy and chemo, was back in 2004, I remember the chemo as bad as it was didn't compare to the radiotherapy, it only takes a second to get zapped as they say, but over time it burned like hell, nap wouldn't be how I describe the fatigue, once asleep, the earth moving won't wake you, it's so very tiring, you'll need all the support to even get a bit of food into you, to have the energy to wash, trying to find products with no aluminium in it back then was a disaster and being unable to wash with regular scented soaps, that's only a small price to pay for being so well again, I didn't think it at the time, I wish you all the best with your treatment, I've been there and hope I never have to go back that way, Wishing you a speedy recovery