My Mom died of ovarian cancer 1 year 11 months and 1 day ago.
What did I learn?
* Quality of life teeters on the edge of a nail. One day things can be great, the next you're looking into the abyss. Although this can seem dreary, this is more reason to enjoy the health and quality of life you have today.
* There is never a wrong time to go after the things you feel are important. When I found my Mom was diagnosed, I disengaged from work for a good couple weeks thanks to a great manager (and, thankfully, a pretty convenient lull in strong deadlines). After much soul searching, I knew that life was too short to work at the large company I was working at, and it was time to pursue my dreams of being self-employed, something I knew I wanted to do full time since I was ten years old. Seriously, I knew I wanted to be self-employed even back then. That was over 2.5 years ago, and I am still happily self-employed. My Mom's illness gave me the perspective I needed to stop worrying too much about certain types of failure, especially since I had been saving up a reasonable emergency fund in case my self-employment experiment failed. Thankfully, it has not!
* Steve Jobs's fantastic Stanford commencement speech lucidly talks about this realization: "Remembering that I'll be dead soon is the most important tool I've ever encountered to help me make the big choices in life. Because almost everything — all external expectations, all pride, all fear of embarrassment or failure - these things just fall away in the face of death, leaving only what is truly important. Remembering that you are going to die is the best way I know to avoid the trap of thinking you have something to lose. You are already naked. There is no reason not to follow your heart." To be clear: that does not mean YOLO, nor does it encourage making unwise decisions. But the death of my Mom was the ultimate in sobering reminders of the importance of this thought, and since that reminder it has shaped many parts of my life.
As someone else commented, whatever emotions you feel are okay, as long as they are not hurting you. Surrounding yourself with any friends and loved ones is the path to healing, even if they don't understand what you're going through. Find those that will stick by you and not judge, or at least will listen to you.