Suggest Treatment For Headache While On Chemotherapy

I have been taking the chemotherapy pill and just recently have a ongoingheachache. Hurts to bend down, hurts when I cough, and I have suttle low lying pain all day in the front upper portion of my head. It may or maynot be side effect, but I dont think so to this extent since haven't had before. What can I do and what do you think.