Hello! I track my period through an app called clue, and I’m noticing that my periods are very close together and definetly not once a month. Most recently, from the end of my last period to the beginning of this one, it was only a 13 day gap between. My periods are around 6 days in length. should i be concerned or go to a gynecologist’s office? I am 15 and have had my period for somewhere around four years now.