In the Scripture, Paul wrote, "I planted, Apollonius watered, but it was God that caused the growth." When I worry, I find that it's usually because I'm trying to do what is God's business, and have found great comfort in Paul's analogy. You can plant a tree. You can water a tree. You can't make a tree grow. That's out of your hands. Trust that those things that are out of your hands are in more capable hands than yours.
Jesus Christ came to bring us hope, not guilt. Get up every morning, make your best pitch, and trust God to take care of the rest. Hope this helps.