Posted By Discussion Topic: patch tests and periods   Tulip 03-10-2007 @ 9:52 AM                           reply Member Joined: Jan 2005 I had some skin patch tests at the beginning of the week.Does anyone know if they can affect your periods?I was due Thursday and I still haven't started,Im never late! tulip swift 03-29-2007 @ 11:38 AM                           reply Member Joined: Nov 2006 maybe you are pregnant?