Mucus plug question

I am about 13 days out from my due date and I still haven't lost my mucus plug. I have been on the look out for it and nothing. I have been having increased discharge and I see it in my undies during the day but I wouldn't think it's my mucus plug unless it's coming out little by little. At what point did you ladies lose yours if you did at all? I guess I'm under the impression that everyone loses theirs before their due date.