It is not a typo error but it is an intentional or unintentional error which happens sometimes when you send a text that is meant for someone else to someone you are thinking about. We called it “My Period Hit Today Damn It was for Mom” it is like when you are working some problem out you get to know that there is something you need to say to your mom during your period. e.g. To get the tampons but right at the time of sending the very message you are thinking about your BF.
This is what happened but it turned out well when the boy friend replied that he just picked up Tampons and Candy now he is willing to bring a movie to his Girl friend to calm her during her periods.