Girls, who has left a piece of placenta after childbirth? I have such …

Girls, who has left a piece of placenta after childbirth? I have such a story. I gave birth in the Czech Republic, here they don't check the placenta and don't do ultrasound at discharge. Only if the delivery is difficult or Cesarean section, then by indications, and I had everything easy. They said that if there wouldn't be complaints, then after 6 weeks you need to go for control to your gynecologist. There were no complaints and after 7 weeks I went to my gynecologist and they told me that I have a piece of placenta left, quite big, it won't come out on its own. Sent to the maternity hospital, they looked and said to take antibiotics and drops were given,