Can i be pregnant if i missed my period, or if i'm late on it? this is the first time i miss my period since i been off birth control (implanalon).

Maybe. Maybe not.: In a woman with regular periods, some causes of a late period include: excessive weight loss or weight gain, increased exercising, emotional stress, having an illness, traveling, medicines (like birth control pills), hormonal imbalances, etc… Pregnancy is the common cause of a missed period, if sexually active. One can do a urine pregnancy test, 3 weeks after sex or 1 week after missing a period.