Ever had a child? It is possible to have a fistula between your anus and vagina. If possible, see you doctor.
Thanks I am going to the Obgyn this week! But thanks for the feed back
Go see your ob-gyn and get swabbed for bacterial vaginosis (BV). If you have it, both you and your husband should have a round of antibiotics. Look up the descriptions of BV online and you will find a foul smell around the time of the period as one of the big obvious symptoms.