Sorry to hear this OP. Yes I have these feelings too occasionally. Not sure if this will work for you but one thing that gives me perspective when I'm feeling s

Sorry to hear this OP. Yes I have these feelings too occasionally. Not sure if this will work for you but one thing that gives me perspective when I'm feeling sorry for myself is to read posts on the subreddit /r/cancer. I immediately count my blessings and realize how courageous/kind people can be. Also it is a reminder that yes, life is finite so you might as well make the most of it.