Thanks for the query.
If you had unprotected intercourse
around the time of ovulation, there is possibility of pregnancy
But just by symptoms we cannot confirm or exclude the pregnancy.
Premenstrual symptoms also can alter month to month depending on many factors.
So you wait for 4 to 5 days, if do not get periods by that time go for pregnancy test once again.
If the test comes positive, continue the pregnancy with regular antenatal checkups and ultrasound
For more details you can ask me through: http://www.healthcaremagic.com/doctors/dr-sree-gouri-sr/63429