I got off my period last saturday, i had sex last night . can i still get pregnant ?

Yes.: Do you know what they call strict practitioners of the so called "rhythm method" for birth control? That's right, parents. There is always a chance of pregnancy when you have unprotected sex, the risk depending on various physiologic factors affecting fertility. Bottom line: always use a condom, BC pills, IUD, or another form of BC if you wish to avoid pregnancy. Use "morning after last resort.