things happen for a reason...

I still didnt find out why did I feel the way I did yesterday. So frustrated, so stressed out and overruled by the vawe of emotions. Is it because I hate when I see that things can be done faster and easier then they actually are? Or is it because I am so unflexible to even a small change of my plans?
There is always a reason why things happen but I cant see it so far. Is the reason that I learn how frustrated it is to fix visa? how horrible one can feel in order to travel somewhere? is the reason that I should be happy that as an inhabitant of my country I dont need to go through this procedure (travels in Europe)? Is the reason for me that I managed to get up early in the morning, travel for 100km, found my way, travel back and work for some hours on the university paper? Or maybe it is not me who is supposed to learn from this. Or maybe I will see the reason later on.