Can a clogged duct cause you to have a fever and the chills? It was really odd but last night I woke up around 1am with a fever and chills. My breast seemed to be a little full and sore so i breast fed my little guy. It got so bad I had to take Tylenol. A few hours later the fever had broke but I was really sweaty. I'm not sure if I have a bug or what but I feel great this morning.