Okay..so i'm 18 and haven't started my period yet at all. For some i dnt feel comfortable enough o talk to my family about it but i do to complete strangers....i'm starting to think that i seriously could have a medical problem & possibly will never be able to have children of my own....can someone please give me some advice on what i should..(and i know someone might say something sarcastic but dnt cause i dont need that right about now. :$