U can get it from Stress, High yeast foods, an High amount of sugar can do it
I jsut got it the other day (very very mild) an im not ttc, mind u i havent had it since i was preg with my girl
As the doc recon i was Pround to them with havin stiches an that That Salt baths did good Lots of waterAn cut down on the sugar lol
I found douchin (sp?) with warm (clean) salt water or plain is the best for helpin clean up stuff..
shower before an after sex expes after sex as some times This is when its starts to happen..

not sure if that helped but thoguhts id give my 2 cents