Its no big deal.
I started when I was eleven and I'm seventeen and I still wouldnt have regular periods if I hadnt had goten on birth control.
Its nothing to worry about.
You should only worry when you have a period that lasts longer than a week or if it doesnt come at all. Or if you get more than one period a month.
And starting at the very end of the month and then carrying on into the first of the month isn't anything to be alarmed about.
I started when I was eleven and I'm seventeen and I still wouldnt have regular periods if I hadnt had goten on birth control.
Its nothing to worry about.
You should only worry when you have a period that lasts longer than a week or if it doesnt come at all. Or if you get more than one period a month.
And starting at the very end of the month and then carrying on into the first of the month isn't anything to be alarmed about.