I got my period a week early, what does this mean?

well if you got your period a week early thats not a bad thing that happens all the time some can have spotting some don't have one but every other month some have periods that are heavy and some have periods that last longer then 4-7 days things that can cause your period to be late it does what it wants when it wants thats simple stress nerves birthcontrol things like this if you arent on birthcontrol pregnancy also can cause it