Help me out

I got my period 4 days late. Normally I bleed heavy the first 4 days then it slows down but today is the 5th day and it’s still heavy and I don’t know why. I haven’t had sex and whenever I look up stuff like this jt leads to a miscarriage. But I haven’t done anything. I don’t know if bleeding longer then normal is okay or not and why I am bleeding more then normal