I don't know if it helps to hear others stories or not but thought I'd share in case it does.
My lump was about 2 cm when I found it and quickly grew to 7 cm in 3 weeks. My doctors started chemo first and shrunk the tumor to nothing.....they couldn't find it to even mark it for surgery. They did a mastectomy anyway because the tumor was so big. The did a sentinal node biopsy at the same time that showed no node involvment but they still classed me at stage 3 because I'd already had chemo and the tumor was so big. I did half my chemo (2 months), then surgery, then finished my chemo (2 more months) followed by 7 weeks of radiation and a year of Herceptin (I was HER2 positive). It's been 2 years this month since I found that lump and sometimes I can't believe I made it through! The support of my friends and family and the comedy relief of my kids pulled me through.
Take things a day at a time. sending you strength and healing thoughts.