One of the hardest problems we face as Christians is evil and pain. Not because we do not believe in God, but because we believed in him and still expected the world to behave. I remember when I was small. Whenever they called us to pray, we would say, "God, please do not let any bad thing happen to my family and friends." That was the whole theology. A protective fence around everybody you loved.
There are things that will happen completely outside your control. Scripture says that plainly. As long as you are on this earth with assurance of salvation, you also have assurance of trying times. The two arrive together. That is not a bug in the system. It is part of the honest fine print.