 [ Symptoms ] i am 16 girl and i have had my period for 2 years now i havent had it for 4 months not pregnant i have never had sex [ Disease ] it is not uncommon for your period to be irregular at times especially when you are young are you more stressed out than usual have you lost weight recently or have you been exercising a lot these things can all affect your period if your period does not return in a month or two you might want to talk to a doctor to make sure all is ok