I had a lumpectomy in the summer, 5 sessions of radiotherapy and am now on Anastrazole. The only side effect until now has been hot flashes. Ive been coping well. However, the last two weeks, I've had dreadful fatigue and bone pain in my legs. I have Fibromyalgia and it feels like a massive flare up (worst in years) It started the day after having spent two hours outside in the freezing cold waiting for a recovery van when my car broke down. I'm wondering whether it if Fibro flare or down to the hormone tablets? I do gentle water therapy twice weekly.. I'm not taking the calcium at the moment because it causes me dreadful constipation. I eat a lot of cheese, yogurt and other foods to boost my vitamin levels. Could my vitamin D levels be low? Thanks in advance.