actually im 14 and weighs 36 (underweight) and I started mah period on november 2012 novembr I had my period (3 days) december= no period january= I got it february=no period again march,april= I got it may,june=didnot get it .......................... ANd when I get my period I dont have any pain ,no stomach pain,no cramps at ALL,,, sooooooo is that normal ??? why am I missing it soo much? do u have the same problem?? ^^