Very similiar to my mother's last days. My mother had cancer and was bedridden at the end, so she was only getting sponge baths. A couple days before she died she begged me to bathe her and curl her hair- she said my dad was coming for her on Thursday. My dad had passed away 5 years before. Mom was on some pretty good painkillers and had been saying odd things so I didn't think much of it at the time. I tried to bathe her as best I could and curled her hair. Mom passed away on Thursday night, dad came for her just as she said he would. The strangest thing about her knowing the exact day she would go is not only that the doctors thought she had several weeks left to live, but also that due to the drugs she was on she did not know what day of the week it was from day to day- so her saying Thursday and it turning out to be Thursday was pretty amazing.
My personal viewpoint is that God created this wonderful world filled with beauty, elaborate design in the different species and tells us that a place is being prepared for us as Jesus said "I go to prepare a place for you".
So, IMHO, I feel that we do not die alone. We were not born alone - we were received by a mother who carried us. So, not too hard to believe that God (in his awesome creation) also planned that each would go to the hereafter with the guidance of some being to lead and comfort us.
It could be we are programmed in our brain to see this being as we enter death, it could be the duty of angels, or it could be physically transporting and meeting those who have gone before. We don't know. Yet, possibly death sets in motion chemical, physical, or whatever reactions that progress us to the next stage. Whatever method it just again shows God's wonderful, caring creations in this world.
And just imagine how blessed we are to have a God that chooses to show beauty, love, goodness for His children and His creations rather than a god that would be honored only by evil actions, hate, torture, killing.