 [ Symptoms ] i havent had my period in 6 months then i got it for two weeks nowi havent gotten it in 5 months and have not had sex [ Disease ] sorry you are going through this you do not say how old you are or how long you have had your period so let me give you some general feedback if you are a teenager or recently started menstruating this sort of fluctuation of your cycle is not uncommon in fact many women do not settle into a regular cycle until after puberty    and some women never have a truly regular cycle so this on and off period may not be abnormal for you if you are a post pubescent woman whose cycle has been fairly regular in the past then i would suggest you get this checked out by a gynecologist many things can cause a woman is cycle to become disrupted including eating disorders being very athletic and having a low percentage of body fat however there are other more serious conditions that can cause this period irregularity too and you would want to get those ruled out by a medical professional i hope this helps