i knew someone would bring this up at some point and i’m glad you did  this has become especially common since 5 months ago when my father died every day i think someone is going to come next whether it be my mother or a close relative i’ll be alone and suddenly think “it’s very quiet in the house right now what if they need help and you don’t know” or if i’m in the car with them i’ll think “what if everything is okay right now but in a few seconds they suddenly lose consciousness behind the wheel putting you both in danger while they need immediate help”  it’s a horrible thought process and i’m sorry you experience that as well hopefully it gives you some piece of mind that you are not alone here