Thanks for the query.
If you had unprotected intercourse
during your ovulatory period, there is possibility for pregnancy.
But just by symptoms we cannot confirm or rule out it.
One side fallopian tube
and ovary are enough to get pregnancy.
After crossing your expected date of periods you wait for 4 to 5 days and go for pregnancy test again or you can go for blood test
for pregnancy now.
If the test comes negative, once go for blood tests for hemoglobin
levels and thyroid profile to rule out those possibilities.
For more details you can ask me through: http://www.healthcaremagic.com/doctors/dr-sree-gouri-sr/63429