Youngmam, I believe thats called a subchronic hematoma, here is a link:
https://www.whattoexpect.com/pregnancy/pregnancy-health/complications/subchorionic-bleeding.aspx
Sophie, now that you're 10+, it can be normal for your P to drop off just a little as your placenta begins to take over.
AFM: Surgery in an hour and half. I'm honestly scared out of my mind.