I received a package today that was addressed to me, shipped by ups apparently (checked the tracking at it worked) had a return address to a warehouse in New York. I have a couple of packages on the way so I opened it but instead it was a pack of napkins from an unidentifiable Chinese brand that I didn't order. For some reason I opened the package and took out a napkin and fine powder came out. It was like dust, not a huge amount of powder, it just looked like light dust. I know napkins can have dust come off of them sometimes but I'm a very anxious person and I'm scared I was poisoned with anthrax or something. What should I do? Am I fine?