Walaikumasalaam
& welcome to the forum! Hope you continue to stay with us for a long time to come in sha Allah.
It's funny, as human beings we always reach out to Allah swa when we are in need and sometimes we forget to thank Allah swa for the good times (just something to remember, this applies to me too). So i have tried amending my ways and thanking Allah swa for the good times too. Alhamdulilah.
Congratulations on finishing all your exams! I can imagine how stressful it must be for you, especially the waiting around for the results!!
My teacher used to always say (something that i found to be true for me personally), if you found the exam hard it means you have really thought about the questions and answered the questions well. If you have found the exam easy then you haven't really given the exam much thought and more likely to fail. So maybe this gives you some reassurance? I don't know if this applies to your situation but i hope it does in sha Allah.
Were you able to answer all the questions?
Don't worry too much (i know that's easy said than done), but focus your mind on your daily activities and when the results day come, it comes. You've tried your best and that's all you can do.
Also, one very important thing - am sure you have read - Allah swa answers duas according to what his/her servant thinks of HIM. So if we think, Allah swa is not going to answer our duas then Allah swa will act accordingly. If we think Allah swa is listening to me and WILL answer in sha Allah, then if Allah swa wills, this is what will happen. So always think positive!
Am sure you've aced the exams and try and relax. Maybe play football with friends or go gym? Do something physical to release the happy chemicals in your brain in sha Allah.
Allah’s Apostle (s.a.w) said: “Strange are the ways of a believer for there is good in every affair of his and this is not the case with anyone else except in the case of a believer for if he has an occasion to feel delight, he thanks (God), thus there is a good for him in it, and if he gets into trouble and shown resignation (and endures it patiently), there is a good for him in it.” [Saheeh Muslim]
Let us know how you got on!