You did not get results because you indulged in fear thoughts. When you place a seed in the ground you do not dig it up again later in the day. You let it take root and grow.
Suppose, for example you are about to say "i will not be able to make that payment." Before you get further than, "i will --" stop the sentence. Change it into a constructive statement such as "i will be prospered in all my ways."
