Newly diagnosed

Hi, my life was turned upside down on Friday and I'm so scared. I wasn't worried about a lump or anything and.i kept putting my lumpy breast down to my periods, it wasn't until I'd noticed some dimpling on the outside of my breast that I went to the doctor. Now I'm so worried I have left it too long. I had a monogram, fine needle procedure and a core procedure. Then I got called into the consultant who said I have two lumps under my arm and quite a size cancer in my breast. I couldn't believe I was having this conversation. He wants to start chemo straight away and check it hasn't gone anywhere else. This is the bit that is worrying me as I have lower back pain at the moment and I am imagining all sorts. I have had to tell my 16 year old son who is about to sit his GCSE's. I have separated from their dad so am so worried as to the future. Going back tomorrow to see the cancer nurse as I didn't know what to ask her, having my bloods done and an ecg.  Waves of tears keep coming me, I'm trying to be strong but I am in so much shock