When I did my training for my PPL, the first few flights were alright. Until the point where I started practicing stalls. Got sick a couple of times. That was the lowest point in my training.
I had left home and went down to Aussie all on my own to train for my PPL. At that point where I started getting sick, I felt all lonely and lost. Once I got over the getting sick phase, it was much better. Granted, there were other times I felt down, but grit your teeth and bear with it. You will get through it somehow.