Knight,
I think you have received some excellent advise, particularly from Naughty and Dr. Rock.
Women respond and act differently with their cycles. Some women experience a lot of pain and cramping and simply do not want to be bothered with anyone, even those who are trying to be helpful. Being one of those women, my period is a time when I don't want to see anyone, be near anyone or have anyone asking me any questions. She simply might be one of those people - even if it is late. Even if she is "just" late, the symptoms occur early - almost like a precursor, if you will.
On the other hand, if she is late, she might be a little concerned. I can appreciate you saying that "everything is cool," but for her, it is a little different. Women have a lot more responsibility when talking about the possibilities of pregnancy as well as the public outlash if she is young and unmarried. Males get off easier. I can see where this is a concern for her, especially with the morality police and her thoughts about people judging her. I will leave that as is....
Be gentle with her. If she tells you that she needs a breather, give it to her. Maybe you should wait for her to call. Allow her time to get over this; obviously something is going on and she needs time to adjust and cope with it before bringing anyone else in the picture. She is not lashing out towards you, I don't think. Let her get her thoughts together and then she will hook back up with you.
Wishing you well.................
bb