Having Faith

The past few days have been filled with fear and trepidation. The night before last I was up worrying and God told me to "have faith." Instead of having faith that He would take care of everything regardless of whether or not I liked the outcome, I lost hours of sleep over it both that night and the next morning. Still ignoring God's command, the next day was filled with more apprehension. And then today the answer came. It was the answer I wanted. Yet I feel foolish. Foolish for not listening to God and not trusting that his statement of "have faith" would have the outcome I wanted. When will I learn that regardless of what happens He has my best interest at heart?