Subchorionic hematoma

Hey everyone. My fiance is 6 weeks and 2 days. The other night we thought she had miscarriage after she discharged a large piece of placenta. After going to the E.R they told us it was a subchorionic hematoma. I was hoping to reach out and find someone else who has experienced this so I know what we should be doing. Im stressing that something is going to happen to the baby. Even though the E.R told us the baby was okay. So if anyone has been through this please contact me!