So I Was 5 Or 6 Weeks Pregnant And There

So I was 5 or 6 weeks pregnant and there was some complications with my pregnancy and I went to the ER to get checked and they said it had no heartbeat or anything, like there wasn't even a baby or yolk sac. So the day after I went I started have really bad cramps and then afterwards I passed a HUGE blood clot with white stuff in it and continued to bleed for about 8 days. I just wanted to know if this was a miscarriage.