Hi,
Welcome back to ehealthforum,
Thanks for the repeat query.
The timing of the sexual contact seems to lie during your probable ovulation days (if you have regular menstrual cycles). Lighter and shorter periods could also be suggestive of possibility of pregnancy. If the semen came in direct contact with vagina or vaginal wetness, pregnancy can result. If you suspect to be pregnant, or if you are having symptoms suggestive of early pregnancy, or if you miss your next periods, you should consider visiting your doctor/gynecologist for further evaluation/examination (to confirm pregnancy related changes/signs in body) and blood/serum HCG level test (to confirm/rule out pregnancy accurately). Take adequate rest. Drink plenty of water. Maintain healthy diet. Avoid caffeinated and carbonated beverages.
Take care.