My MO told me at the begining that he would like me to have chemo every week I had a week of radiation, but he also said in reality most people's bodies can't take all the chemo. I went 5 rounds, and he stopped. I was so weak, and my mouth had so many blisters, and I got the yeast infection, I didn't get the 6th treatment. He said it wasn't worth risking my health. I even took 4 days off radiation, then went back to finish the radiation. I wanted so bad to do everything I could to get rid of this, but I also realized I didn't want the treatment to do more harm. Hope this helps.