Hi there, So my periods are always regular, usually 28-29 days apart. They are always 7 days straight as I record them. I had unprotected sex a week before my period came, but second cycle came, and Im a little confused because its out of the usual. It came about 2 days earlier, and only lasted 3 days, much lighter and had a little brown discharge. I have been getting the most agonising headaches and Im not sure what to think - should I be worried