I'm so scared...

Lisa • 36 years old, first time mom after 7 years ttc, baby boy Colton born Aug. 23rd 👶. Lost 2nd baby at 7 weeks.
So I'm having a bad day. Dr told me my ultrasound showed that I have subchoronic hematoma, which is blood between the uterus and placenta and if it doesn't go away I could have a miscarriage or preterm labor. I'm so scared. But praying for good news at ultrasound in 2.5 weeks. Until then I have to take it easy and only walk 15 minutes a day, no sex and no heavy lifting. 
I was also tested for gestational diabetes and toxoplasmosis. Hoping those tests are negative.