OMG Chrispa...I cannot imagine what you are going through. My only experience is a niece who is a cancer survivor. She was diagnosed when she was 40. She had a double mastectomy and re-constructive surgery. She has been cancer free for 6 years now. So there is hope. She too has young children and I'm sure went through many of the same scares that you are.
There is a website that might be of help. It was founded by a local new woman who also had breast cancer. The site is http://www.abcdbreastcancersupport.org/ which stands for After Breast Cancer Diagnosis. It helps with all the questions that must be running through your head. I know my niece said it helped her immensely. I hope it will do the same for you.
You are in my prayers to beat this thing.
God speed!
Kathy J