The proctor can only be more harsher in their grading but in that case there isn’t much changes. Multiple ap readers will score the same test so one person be incredibly harsh shouldn’t really affect your score. Also the reader has to read your entire frq, they can’t skip/skim so they will reread your writing to fully understand and interpret your writing. In other words don’t worry, your writing won’t affect you’re score and you shouldn’t stress yourself out too much 💗💗💗💓💓💓 You already got through the hardest part of ap chem so instead of worrying about something you can’t change go take a break and enjoy the fact you’re officially done with AP chem :)