Progress for me rarely comes in a steady flow, but more like a step function. Maybe it is the way I study. I will often work on (struggle on :-)) four or five songs at a time. For the longest time it will seem taht nothing is coming together. Suddenly, all of them will click all at once. And, I know it sounds weird, but often I will show the most improvement after coming back from an extended break of days, or even weeks. You would think that I would regress a bit and have to re-learn, but often it is the opposite. So...if you are stuck, try taking a break. Your guitar, lessons and songs will be there waiting for you.