4 days late period. had pms symptom only on the expected date of period but no period. now no pms symptoms. no intercourse or direct genital contact?

Missed Period: If you are not sexually active and pregnancy is not a possibility, then a missed period is usually not a big deal. It could simply be late, or you may not get it at all this month. A normal cycle is between 21 and 35 days. This would not be anything to worry about unless you miss 3 periods in a row. Make sure pregnancy is not an issue!