Sorting Out My Feelings

I'm writing this because I just want to vent a little. ※This is not a happy topic. ーーー My grandfather passed away yesterday. He had been in and out of the hospital a few times over the past year or two, but each time he seemed fine and we could talk normally. I was told by his doctor that he had been given a terminal diagnosis and might not make it past the autumn equinox, and that he would eventually lose the ability to speak. I prepared myself for it. However, when I saw him in the hospital room, he seemed more energetic than I expected and was speaking clearly, making me wonder if what the doctor had said was true. It was the autumn equinox, and after visiting the graves, I went to see my grandfather. He was lying in bed, but he seemed well and was talking, which gave me some relief. A few days later, his condition worsened, and he could no longer communicate. I wondered why, when he was speaking so clearly just a few days ago. He had weakened swallowing ability and couldn't eat anything. His breathing became shallow, and I was told he was in a state where anything could happen at any moment, filling me with anxiety. The next day, my grandfather passed away. Our last conversation was about something very trivial. Even so, I keep thinking that I should have called him more often or visited him to talk.