Probably nothing.
It could be that your period is early by a week
There is not a problem if you start your period a week early. It is completely normal for this to happen.
it is a possiblity that you are pregnant, and you're getting implantation bleeding and not your period. wait a week after your period was due and take a test.
It means your period came a week earlier than you had predicted.That's it, there's nothing more to this than that - your period was just early.
it means nothing. Periods dont usually have an exact set time. They can vary a few days or even a week
Whe your period has these sudden changes or "comes earlier" this may most likely mean that your cycle is actually "switching." For example, if you usually come on at the very END of the month and you come on again a week earlier, this means that your new cycle will be in the middle of the month.
It means you need to talk with the health professional who prescribed the pill. The dosage may be too low or there may be other issues.
mine was a week before my period my friends was a week after her missed period..
it always varies whaen you have your period. When you are pregnant you do not get a period.
Just irregular or hormone off balance
This doesn't mean anything. It's certainly nothing to worry about. Mine can sometimes be a week early or even a week late. It won't always be on time.
Nothing bad can happen from starting your period 1 week early. If this happens it is probably because you're irregular but it does not cause problems.