Grieving and pregnant.

On Saturday, my sister, brother in law, and 7 month old niece were killed I a car accident. They are survived by their 5 year old son, our beautiful nephew we are in the process of rehoming with his grandparents and aunts and uncles. Today we went through all of their things to decide what to keep, donate, store....
My husband and I agreed it made the most sense for us to take the baby's things, but I can't even look at them. I feel so bad to even have a baby growing in me when we just lost one so beautiful the other day, not to mention my siblings and two best friends. Has anyone here death with the loss of a family member while pregnant? Any advice? I am struggling to eat and sleep and I'm so worried my grief is going to hurt the baby in some way. Like, I hurt so bad, how could it NOT affect the baby?