Suggest Remedy Fro Flu Symptoms After Radiation Therapy For Breast Cancer

I am stage 1b breast cancer. Lumpectomy and finished radiation 1 month ago. Last 3 days having severe flu like symptoms. Chills fever 101-102.8. Body aches fatigue dry cough. Went to dr. Saw his PA. She gave me 8 different scripts from inhaler to prednisone to Tamiflu and every thing in between. Now I am thinking maybe this could be related to the Femara I am taking. On 3 weeks. Should I call oncologist or really is the flu