You cannot JUST trust in God. Trust in God has to be learned and maintained. It is a discipline which needs daily dedication. You have to trust more each day. You have to be intentional about trusting God, because as with trust in anything, it must have a risk involved. You have to risk something, some security, some comfort in order to trust in anything. Trusting God requires some sort of risk you are willing to take. You trust each day by facing those risks and making a choice EACH DAY to say:
"Today I am going to trust God in this situation."
"Today I will pray in the midst of my pain."
"Today i will tell God I am scared and lonely, because that is honest and I know he hears me."
"Today i will believe that God is sovereign; even if I can only half-believe it."
"Today I will trust God."
You cannot JUST trust God. Trust in God is a learned and dedicated discipline.