I need your guys advice

By my calander my period was suppose to end on Wednesday the 24th. But my period was weird this month I bled for like two or three days like normal and then nothing. Usually I only have one day where there is little to no blood at all and lasts 7 days. Then for the past 4 or 5 days I've been nauseous barely eating dry heaving and very tired. Is it possible for me to be pregnant?