Subchorionic hemorrhage/ threatened mc

Started bleeding yesterday at 6 weeks and it turned to spotting with light cramps. I went to the ER and they said my cervix is still closed and there was no active bleeding but still some blood in there. They did an ultrasound after the pelvic exam. Dr. Said I have a subchorionic hemorrhage and I had a threatened mc... he also informed me that the u/s tech saw 2 sacs and 1 heartbeat?! Has anyone had a subchorionic hemorrhage and went on to have a safe pregnancy? And what does 2 sacs and 1 heartbeat mean? I’m trying to stay calm and rest but I’m really nervous and still waiting to get into my OB. I also have to go back tomorrow and do more blood work (they want to watch my hcg levels) thank you ladies!