Feeling So Good

Hi everyone. I am new here. I was diagnosed with breast cancer yesterday and I feeling oddly calm, happy, relieved and positive. In some ways I feel it's the best thing that could have ever happened because all of the stupid fears that kept me from living a full life have literally dissolved overnight. I don't know if it's denial or how I really feel. Has anyone else had this experience? All I have seen is being talking about being shocked, fearful, terrified and depressed. I am worried that what I am feeling is not normal for the situation, but I dont want to fight it because it feels so good.