Dad died yesterday

Hi just wondering my poor dad had lung cancer and he was at a appointment on Wednesday then after that everything happened so quickly I was lying bk on the chair near his bed and I spoke to him then I've must of dozed of and half 3 in morning I've jolted awake and all off a sudden three nurses were coming into room and they says he had passed away do u think he was telling me he was going I can't get my head around it