Angie, you are in my thoughts and prayers.
When I had my first child, they pulled a small fetus from me as well. The second baby never showed up on an ultrasound, and we never knew we had a twin. What kept my daughter safe from infection, etc, was they had two separate sacks. I was beyond devastated, as I had lost a child I didn't even know I had. I know the pain you are suffering, and I know that God will place a healing hand on your heart. He will lift your spirits again