Heavy bleeding during pregnancy

I’m 8 weeks and 6 days. Yesterday I had heavy bleeding all of a sudden. I passed a clot about the size of two quarters. However, I had no cramping the whole day. I called triage and they told me not to worry too much about it because of the no cramping. As of today, there’s only brown blood.

I had an ultrasound at 7 weeks and 3 days and there was a heartbeat. My next ultrasound is on the 24th of this month.

Has this happened to anyone?