I'm sorry that no one got to your post earlier but with so many panic posts they often get pushed down on the list.
I have re-read your post and no I don't believe you will be sick. You were correct in saying that noro is spread through v* and d* particles. So if no one was a actively being sick near you or had not washed their hands since the last time they had been sick (which is very very doubtful) there is no way you can get ill from them.
Yes noro can take up to three days to make someone ill but it seems it is usually shorter than that
So all in all I'm sorry no one responded to you sooner and I hope you are doing okay now