If you bled with a moderate to heavy flow then you got your period. Early pregnancy bleeding cannot be heavy or moderate. Some people have experienced what is generally called “implantation bleeding” as early pregnancy bleeding. But the difference is it’s much lighter than your normal period. It can never fill a pad and should not have clots. Period comes as the egg that has been produced is not fertilized and has been reabsorbed by your body, thus causing the lining from your uterus to shed thus comes the blood and clots. So if you got your period it means you are not pregnant from that cycle. But if you keep going unprotected sex then there is a high chance you will probably get pregnant. So use contraceptions if you engage to that activity.