I got a letter in the mail saying The purpose of this letter is to advise you that a priority mail parcel withUSPS tracking number xxxxxx is currently being withheld from delivery as there are reasonable grounds to believe its contents are non-mailable, and possibly in violation of federal law, specifically, the controlled substance act. Our attempts to contact the mailer to obtain additional information have been unsuccessful thus far. It gives me the option to go get my package but I don’t know if I should or if it is a set up. It’s only an oz of tree. What should I do? Anyone else had this happen?