Subchorionic hemorrhage almost gone in 2 days?

Almce

Looking for advice here because I’m very confused. I’m currently 9 weeks. A few days ago I felt a big gush of fluid coming out of me. I immediately thought I was miscarrying and my OB nurse told me to go to ER, which I did the following day. They found a huge subchorionic hemorrhage 7.7 x 3.9 cm and basically told me I should prepare myself for miscarriage. Baby’s HB was 190 and the ER doc said it’s too fast, the baby must be in distress. I had more bleeding the following day and more fluid this morning. Today, 2 days later, I went to my OB for another ultrasound. The ultrasound technician seemed very experienced and she only found a small collection of blood under the baby, she said they don’t even measure anything that small. There was no big black blob on the screen like we saw in ER. While she did mention I may have a bit more bleeding, she said the rest probably came out already or turned into a clot. I was so freaked out after my ER visit, I don’t understand how it’s possible that 2 days later it’s no longer a concern. I read that it may take months for such a huge subchorionic hemorrhage to resolve. I’m so confused and still don’t believe everything is fine.