Ang, as Patti points out, lymph nodes can swell when they are doing their job of fighting infection. When we have minor infections, our bodies can often deal with them without a doctor's intervention in a week to ten days, and swollen lymph nodes may be perfectly normal in that case although that size sounds big to me. Generally, a symptom that occurs on both sides at the same time is not likely to be breast cancer, but egg size lumps need to be checked out by the doctor, especially if they have been there more than a week or two.