Immediate reaction to radiation

Hi. This is my first forum and I'm crying as I write this because I don't want to be feeling the way I do right now. I had surgery on my left breast to remove invasive ductal carcinoma on 1/26/18. A week or so after the surgery i was diagnosed with a mild infection in my breast (my breast was slightly inflamed, pink, with intermittent pain) and was given antibiotics. It took four rounds of antibiotics before the infection was gone. I began radiation therapy about ten days after no longer having the infection. After four radiation treatments my breast was infected again - swollen, pink, intermittent pain and i had a lot of fatigue, a low grade fever, and a cough. Stopped radiation for 12 days to meet with an infectious disease doctor and take more antibiotics. The infectious disease doctor also said that it was a "mild" infection. As of Monday the infection was gone again, so yesterday I started back with the radiation. I had my second radiation treatment this morning and I'm feeling extremely tired, with a cough and I have a low fever again. Everything that I've googled about radiation therapy states that you don't feel any effects for the first two weeks. How can i be feeling this way? Has anyone else had an experience like this?