A little Consistency, Please

Why is it that it is so easy to believe that God has everything worked out one minute, and the very next day have a melt down about the proper way to fill out disability insurance paperwork? To be convinced and at peace on a Saturday about a big decision, and then be completely upended by Tuesday? I'm repeating this to myself all day: I change, God does not. Nor do His promises. If you happen to find me huddled in a ball beneath my desk ( yes, I can still fit under there) please be so kind as to repeat that to me. Thanks.