It's starting to sink in.

Hi Jo_Ellen20, It is all a bit of rush sometimes. I was diagnosed, had a lumpectomy, and started chemo, all within 2 months. I was adamant I didn't want to do chemo (having done it 22 years ago for Leukaemia) and I was adamant that I wanted to continue to work.  However I had to bow to pressure from my oncologist, breast nurse, family etc.It was hard, but I am glad I made the decision and started chemo which will be followed with radiation.  My concession was that I would go into work out of hours, as I feel well enough.  This has helped me get through. It gives me something to aim for. My husband has been able to come with me for pretty much all consultations with surgeon and oncologist.  He was able to bring me in and stay for a while with my first treatment, I sent him home  because I was in overnight (as a precaution) and my treatment didn't start until later in the arvo. Some hospitals are very strict on visitors, I guess I was lucky that my hospital is a bit more  flexible. I have found that I write my thoughts, feelings, worries, questions in a daily journal.  Make use of the official cancer websites and forums. Remember that everyone reacts differently to treatment. Just take time for yourself when you can, celebrate the small steps and look past the set backs (they are only temporary), have a goal to aim for (returning to work, sport, hobbies etc.) start a new hobby. 
Any finally, as the great and wise Rafiki says:  It doesn't matter, it's in the past.