Just been diagnosed

Hi, I have just been diagnosed with endometrial cancer and I suppose like everyone who is newly diagnosed, my head now feels 'mashed'. I haven't a clue how I'm supposed to feel, apart from not really believing it. My consultant rang me with the news (I didn't mind this) but I also have a consultation with him on Monday. He rang so he could get the ball rolling with treatment. 

How did everyone feel when they had their diagnosis? I keep thinking I'll wake up from a bad dream and I noticed when I told my family and boss I was trying to make out it was no big deal.

thank you