accidentally set my main folder as shared in public place
I don't think that there is a method to do that. Anyhow, I bet that the chances of that happening are very small. First, the person would have to have no morals, and second, the person would have had to specifically look for a shared folder, and that is also relatively unlikely. Also, just to be safe, monitor what can be monitored to discover whether your information was taken for a few days/weeks.