Hello
I am 18 years old and i have been a late developer with my period only coming about 2 years ago. My due dates have been irregular and it may come at the start or the end of the month. My period also lasts longer than usual around a week or so. I have noticed that it hasn't come this month yet and even though its still a week left in this month. Is it normal to miss a period if i'm irregular? Should I be concerned?