Trauma?

Any advice for how to get over a traumatic experience? About a week before my baby was born I had a life-or-death crisis. Then about a week after giving birth my baby had a life-or-death crisis, unrelated to what happened before, so we went back to the hospital for six days. Shortly after returning home my sister-in-law miscarried and gave birth stillborn which was heartbreaking. My baby and I are both fully recovered now and he's smiling, we're happy, but every time I lay down to sleep my brain keeps replaying the memories of my crisis and his crisis and my nephew's funeral. How do I stop reliving it all? Also, the worst part is these memories have created a fear in me that pregnancy leads to death. 9 weeks postpartum and haven't had sex yet because I'm afraid of getting pregnant again and I never want to feel that fear from those crises again. Any helpful advice or share your stories of how you got over trauma please