My father died 6 years ago at the end of this month. His cancer didn't kill him--it was shrinking. He had an allergic reaction the damn chemo that they didn't figure until after his death. It is fucked up. I know I am not a regular, but if you ever need to vent to someone who has experienced the loss of a parent, you can always pm me.
I am so sorry. This was me two years ago. He came to visit us, 6 weeks later he was gone. It's heartbreaking. Take care of yourself. It's really important.