I would like to say I am so sorry for everyone who has suffered the loss of a parent or loved one.

This is my story:-

My dad was complaining about his right leg going to sleep often. I admitted him to A&E on October 22nd (a month ago today) and he eventually died 9 days later on the 31st October. Every day at the hospital was horrible. Every day was worse than the day before as every day I went, the more horrible news I got. Day 1 was CT scan on the right leg that showed narrowed blood vessels and deposits on his upper femur, also x-ray showed fluid in lungs and two masses. Day 2 was a blood test and a PSA that came back negative and possible amputation of his leg. Day 3 was CT scan of the chest and no amputation. 
Day 4, the doctors told me he was terminal and that there was nothing else they could have done for him. 
I had to eventually have to break the news to my father, by myself. 
I got no expiration date. I got no answers. The doctors didn't even want to find the primary cause.The doctors decided that it was metastatic lung cancer.
I was told by the hospital that he was going to be discharged and that I need to find a place for him. I moved him on 29th October 2017 and he died peacefully on Halloween. 
He left us so quickly. I miss him dearly and I wish that he was still here with me. 
I cry daily and I don't know when this pain would go away. My dad and I had a very good relationship. He believed in me so much.He was the first man I ever loved. He was my everything. I would call him daily to check up on him.  I would visit him as often as I could as we lived about 2 hrs apart. 
I am happy that he didn't suffer too much. But I think he suffered at home a lot, in silence, as he did not want to worry me. He told he was worried about his health 2 weeks before the 22nd. But that was too late. He never knew that he was ill or had cancer until I told him. 
My heart is so heavy with sadness and I cannot function at work.