So it's Friday the 13th

So, today it's supposed to be the unluckiest day of the year. Well, I wasn't able to do over ten envelopes at Shoeboxed. Also my lips feel funny. Maybe that's some bad luck to me. However, I never really believed in all these silly superstitions. But have you experienced any bad luck today? And also do you know how this superstition got started? Oh, well.