Period or pregnant ? Feedback please

Had this Friday 8/30 not enough for a pad or tampons & then again Saturday morning 8/31 today my period was suppose to start 9/2 & it didn’t .🤞🏽🤞🏽🤞🏽I been having back pain for the last week & stomach cramps for the last weeks now I’m just falling asleep anywhere. Is it a possibility I could be pregnant. My last period was 8/5