I am 4 days late for my period , the day it was supposed to start there was pink spotting . spotting continued for 5 days . unprotected sex pregnant?

You could: be. Only way to tell would be to take a pregnancy test. If it is negative but u still haven't had a period repeat in a week or take a serum pregnancy test at your doctors,

Do pregnancy test: If your period is 4 days late and there is a possibility you are pregnant (i.e. had unprotected sex), do a pregnancy test. If the test is negative, and your period has not started in after another week, do another pregnancy test. If pregnancy is a possibility, make sure you drink lots of fluids, get plenty of rest, and most importantly take prenatal vitamins & gets lots of folic acid in your diet