Confused

I had sex Aug 21, my period came Aug 24! It was heavy and lasted my normal 5 days, and the period was on time. I have not had sex since and my period is now due any day! I have some cramps and sore boobs. But have had new and added digestive issues. Idk why this is scaring me so much but could I be pregnant? I haven’t had sex since that Aug 21 and have had a Normal period right after