I am not sure what type of bc you have but I had dcis and was given choice of lumpectomy and radiation or mastectomy. I opted for a double mastectomy and reconstruction. Whilst that decision was hard I have no regrets. After the surgery I was not allowed to use my arms and if I had children at the time I would not have been able to lift them. I also had a good chance if the bec turning up in my other breast. To have that surgery with kids I think would be harder. I am now a proud mother of a 5.5 month old boy. Bottle feeding has had its advantages. Ask lots of questions from the nurses and surgeons about recurrence and being pregnant if you go through surgery etc. good luck and I hope all goes with with both your pregnancy and your diagnosis.