My menstrual cycle was suppose to come on this week, but instead i have discharge colors of pinkish white or only white. what does it mean? is it a serious matter?

If you had sex since your last period and miss your period by 4-5 days, do a home pregnancy test. If the result is negative repeat the test 4-5 days later unless you get a period by then. Use first morning urine and follow the instructions carefully. Wish you good health! If you do not wish to be pregnant, use contraception all the time, every time. Consider implanted contraceptive, or IUD.