text: I got my period twice within 3 weeks, for the second time within 4 months. Why? I haven't been stressed or changed my exercise plan or diet recently..
target: I am a 19 y/o woman who regularly exercises and has a balanced diet. I take multivitamins too. Not sexually active, not on any medications. Lately, my period has been more frequent. This is the 4th month since when it started. I'm a little worried.