Help went to hospital for backache

Angel

Went to hospital back pain hcg miu was 45 radiologist tells me im having a miscarriage because its so low I ovulated Christmas positive test 8 dpo on 1/2/25 she did a transvaginal and said she sees a sac? But she said looks like miscarriage because it’s oblong I have fluid in my uterus which I seen . I go to ask her can u even see a sac this early? She said no! WTH is going on? Y do I have fluid in my uterus ? Subchorionic hematoma? Then she said don’t tell anyone I told u!!! Anyone ever heard of this