M.P.
This is a major loss. It's necessary for you to grieve. And normal to feel frightened about this terribly painful experience be repeated. It will take time for you and your body to heal. A grief counselor could help you move through this.
The way through is to accept the pain. Don't try to push it away. When you feel the pain, you will get through the pain more quickly. If you push the pain away you're feeling it less. We have to do all the grieving in order to heal.
I suggest reading a book on grief might help. I felt do much better ehen I understood the process.