[FONT=""][COLOR=""][SIZE=""]I'm 20 and I've had a regular cycle of about 28-30 days from the start. Last month it was about 18 days, I thought it might have been a fluke and didn't pay much attention to it, I'm getting cramps today and I think I might get my periods soon(its 17 today.)

If I get my periods early this time too I would definitely go to a doctor.
But for my anxiety, is it possible to have a change this big in cycle if anyone has had a regular since the start? Should I be concerned?

Thank you so much in advance[/size][/color][/font]