Why is my Period Late?
Answers: Are you still a teenager?
It usually takes a few years for your term to adjust to a regular, predictable schedule. I am in my untimely 20's and mine has just lately started being consistent.
It could also be due to changes surrounded by diet or activity.
Most likely it is average!.
My educational guess that your period is unsettled is because you or under so much stress. Just take it uncomplicated and everything will work out. Watch your diet also and that could help out a lot. it could be, or it coud a short time ago be that your body isd changing...ive missed mine a few times before near no real explanation, so just relax and dnt verbs about it if you dont have a accident of being pregnant.
do not worry ,, this is regular
4 days is not that much :0
but if it gets late more than that ,, u better ask a doctor :0