Advice for becoming more confident in programming
I think you are probably asking the wrong question. You aren't going to become a good programmer in a week. Or a month. Maybe not in a year unless it is well structured. 

My advice is to figure out what you are good at, not what you are bad at. Seek jobs that play to your strengths. Not every person that works in computing does so as a programmer, for example. I once told a student who was struggling in a hard course that she would probably wind up as the manager of all the superstar programmers in the class. Why? Because she asked the right questions. Often enough the question is more important than any answer. 

You can't go back and undo the mistakes you made getting to where you are. But if you figure out your strengths and write applications that emphasize them and stress them in interviews you may be fine. Just don't suggest you are a programmer, nor stress that you are bad at it.