My DS is 8 weeks this week and I think I may have had mastitis (again?), but I'm not sure! My left breast by my armpit is tender to the touch (getting better today though) and I had the chills and was very achy and just felt awful. I took some motrin when I started to get the chills so I'm not sure if I ever had a fever. It came on very quickly I felt great all day then at 3pm I felt like I got hit by a bus. I had something similar when DS was about 4 weeks old, there was no breast tenderness then but I definitely had a fever that time and felt worse. Each time it has not lasted for more than 24-36hrs. Could this be recurring mastitis or something else? I haven't asked my doctor since each time it seems to clear pretty quickly, anyone else experience something similar?