I am new to the forum and I have 4 days under my belt which to me is a massive achievement. So I am not going to pretend I am an expert on this. But someone said to me once, if you put £1 in a jar everyday you don't drink and then you do fall off the wagon, you don't take (in your case) all £55 out of the jar for the 55 days you managed. You just don't put a £1 for that day and start putting the £1 the next day.
Good luck on day 56