Blood clot in uterus next to Sac

Hey everyone, I went into the ER because I was having cramping also to check on baby because we are in the middle of a move. I saw my little bean and the heartbeat and we were measuring in at 6 weeks. However there was what looked like a second sac but nothing in it. The doctor told me it was a blood clot. He said it most likely will resolve itself or I can miscarriage 😒 has anyone gone through this?? Did baby make it full term? I'm so nervous.