Isaiah "Even to your old age and gray hairs I am He. I am He who will sustain you. I have made you and I will carry you; I will sustain you and I will rescue you." God will get you through anything. He's the only One who can.
Its hard to trust God sometimes. Our doubts are what really mess with our head. We get into this dark scary place and once we're there it hard to get out. Sometimes it nice just to know that, despite all uncertainties, we are not alone.