Hi! Possible talaga kahit may lumalabas, kasi kahit onti lang ng sperm ay makaka-penetrate na, so hindi mo completely ma-rule out ang possibility ng pregnancy, mas safe kung may protection like condom or hormonal contraception ka. Best thing is magpa-check ka ng doctor kung worried ka, either through blood test or ultrasound depende sa kung kelan mo expected period, para sure na lang at they can give you proper advice based sa situation mo!