Subchorionic hematoma HELP

I went to my 8 week ultrasound appt and I was told I had a 3.7 CM bleed in between the uterus and my cervix, I believe. (My brain got so foggy after I began to freak out.) The baby had a heartbeat, grew accordingly from my 6 week appt, and was moving. My ob mentioned it was a decent size bleed and told me to basically refrain from any crazy activities like sex, bending, carrying heavy objects, etc. Honestly, I don’t know how to feel because she mentioned that bleeds could be an early sign of miscarriage but she said not to loose sleep over it because everything looked fine. Has anyone had this happen before?? I’ve been reading about it but I’m honestly so worried and sad. I’ve been praying nonstop, I just need prayers and some helpful responses please 😞