Periods are very odd. Sometimes they skp a month or are late by weeks and often it's for no reason. Do you have reason to blieve you could be pregnant? Are you having unprotected sex? If so I would go get a blood test done at your local doctors

The only birth control my bf and I are on is these trojan spermicidal condoms. We have never broken a condom, or spilled any near my vagina at all. We've been very careful but we have sex a lot because we know what sex is really about. My bf is very paranoid though and worries every month when my period is supposed to come, but this month we were expecting it since last monday. Last monday was the 24th and ever since we started having sex, its always come on the 24th. If you calculate it would have been about 25 days not 28. So we waited and nothing. So we waited until the 27th of may and nothing. We took the test this past friday...An ept test (those 99.9% accurate ones) and it came back negative so here we are 2 days later and nothing and my boyfriend is having all sorts of panic attacks. Just need to know what to do?

Something that I just realized when my bf asked me was that my twin sister hasnt had her period in about the same time as me. She gets her period a week before me and even at the present time she hasnt gotten her. She is not sexually active by the way.
A friend of my bf's said she is about 13 days late...And that was as of last friday (the 4th of june.) I dont know if she has had it yet but now im not really worried, just really confused. What could be up?