If you don't advance, you will retreat. You dream that you are standing at the bow and walking backwards. There is no power and the water is not deep, which means that you have encountered something that has some resistance but is not very troublesome. You can go backwards without motivation, which shows that you are confident to finish this task, or there is a motivation that you didn't notice to help you in the dark. This motivation may be the current situation, or it may be someone and something that you vaguely think of but have not confirmed. It will soon reach the end of the river, which means that what you are experiencing now is not as difficult as you see. Subconsciously, you think it will be over soon.