How did this happen?

About a month ago I found a lump in my breast through self-examination. I was terrible about doing these. Last one done was by my OB/GYN before Jake was born.
I made an appointment with my OB. He said it was somewhat concerning and should be checked out. He gave me my orders for a mammogram and possible ultrasound. It took about 2-3 weeks before I could get those done.
My OB called me on Thursday, Sept.25. He said there were some abnormalities with my tests. He wanted me to see a breast specialist. His nurse called me the next day with an appointment made with Kelly Dempsey for Monday, Sept. 29 at 12:30. She was very concerned with what she saw. She asked for us to stay and that she would do a biopsy between her next patients. She said she would call us with the results Monday, Friday at the earliest. We got the call on Thursday afternoon. She said it was cancer and that we needed to come see her the next day.