Having to face extreme pressure and stress due to your deadline and complication when undergoing research, would burden anyone. That goes with me !! Won't lie about that. Worse case scenario, the direct effect of over stress, would limit your creativity to write. WHERE YOU'LL BE STARING AT A BLANK PAGE THINKING WHAT TO WRITE !! Has that ever happen to you? For assignments? projects?
The best remedy that i believe to counter this problems, is by having a break. An hour or two to calm your mind. In my case, I would be hitting the gym or playing games just to take that burden away. Different people have different style, though which is the best is still based on individual preference.
So don't give up and put your head up guys.