i had sex on the 15 of feb and had a short 3 day period very light but my doctor is telling me i am 24 weeks or so could i still have gotten pregnant before my supposed period? With my first child iIhad a short 3 day period as well. On oct. 10 of 07 and my son was born on july 8 of 08. He was 9 pounds 2 ounces he was due on the 17 of july. Could it be possible i was pregnant before my supposed periods?