I am 13 and started my periods about 2 months ago at first the blood was brownish and my period only lasted for about 3 days, since then I was meant to have my next period a month later on the 30th November but instead I came on the 16th of December so far this is my 3rd day and my blood is red but I haven't bled a lot and keep getting headachs and cramps is this normal to have short periods like this? :confused: :)