Postpartum clots..

I passed 2 large clots yesterday about the size of my palm and went to the ER but they didn’t really seem concerned said my haemoglobin was good and since I’m not experiencing heavy heavy bleeding and my vitals and all were good they discharged me.. I did have heavy heavy bleeding a couple days ago that soaked through my pads and again went to the hospital and again they said I was fine and discharged me, ever since I passed the 2 clots I haven’t been bleeding and I’m just worried… anyone else experienced this? Oh and I’m 9 days postpartum… And they did an ultrasound at the ER and said they found no leftover anything..