Help please!!!

Summer

So AF is a week late today I tested this morning and nothing.. AGAIN!! I am so frustrated and mostly confused I do have PCOS but for the last 2 years I’ve had regular periods so for the first time in 2YEARS! I’ve missed an entire period and I’m just wondering how late some of you guys tested positive because I’ve heard of people not knowing until later but jeeezzz I’m going out of my mind here ladies help please.