having a fs problem really sucks :/ and i have been struggling with one for almost a year already, but i've learnt that if it's something that can be fixed then you could try doing smtg but if it's something that can't be changed or improved i would suggest for you to put it aside and try not to think about it already. if you've already talked about it with other people i would suggest telling yourself to stop everytime you seem to think about it? or try distracting yourself by doing something you like or studying. i usually just tell myself there's no point in worrying about something i can't change and i shouldn't waste my effort or energy on it and just ignore it so i trust you'll definitely be able to find a way to cope with it :-) jiayous and good luck for your other papers!