Miscarriage lasting 4 days

Ja

I’m currently going through a miscarriage. I’ve been bleeding excessively with clots, it comes and goes for the past 4 days. The first day I went to the ER because I fainted, they sent me home and told me to monitor. Despite telling them I bled more than two pad in one hr. I was only 7 weeks, shouldn’t the pregnancy tissue pass already?? I’m concerned because it hasn’t lighten up yet. I don’t have a Obgyn.. has anyone else experienced this..