If you are a believer, you are not going to escape trouble. To accept Christ does not mean to take out an insurance policy against suffering. The fact of the matter is that you will have trouble after you become a child of God, even if you haven't had any trouble before. He has never promised that we would miss the storm, but we will go through all the storms of life. What He does say very definitely and dogmatically is that He will go with us through the storms and that we will reach the harbor. Any boat that He is in will not go to the bottom of the Sea of Galilee but will reach the other side. You and I are in the process of going to the other side.
The time to be concerned is when there is no cloud in the sky, no ripple on the sea, and everything is smooth and nice. Then you might question your salvation. But if you are experiencing trouble down here, if the pressures and tensions of life are on you, then that is a sign that you are a child of God. This is the way God teaches us to rely on Him.