Help me! subchorionic hemorrhage at 20 weeks

My doctor confirmed I had a subchorionic hemorrhage that was about a centimeter, when I was 12 weeks. She fully expected it to heal on its own.

Yesterday I went for my 20 week anatomy scan, and the bleed has not gotten any wider, but it is really narrow and longer and wraps further around the placenta now.

I go back in 4 weeks. I just want to know has anyone had any experience with this so far into the pregnancy? I know they are more common in the first trimester. I just want our little girl to be okay!

Also advice for bed rest !!!!!!