I had sex a few days before my period? could i still get preganant? is it posible to have my period during preganancy ?

Yes and No...: Technically, if you had a normal period since you had intercourse, you can't be pregnant. However, in real-life, some women have bleeding in early pregnancy that is confused with a normal period. Real periods can't happen during pregnancy. Having intercourse just prior to a period is not a reliable way to prevent pregnancy. Best wishes!