I know how you feel. If someone is unusually late or isn't answering their phone or something the first thought I have is they must be dead. I know it is ridiculous but it just happens. For me the best thing to do is just think about logically and try and distract yourself. It is out of your control so there is no use worrying over it (easier said than done I know!). It is very unlikely that she has died and am sure everything is going to fine. Keep us updated!