I remember in the distant past, exam times and I worried myself sick because of expected results etc. and I remember my mum and dad sitting me down and saying that there was only 1 thing they wanted to see and that was, that I tried my best.
The exam grade is just the first step into the journey which is life as an adult or at least to further a career prospect or work ideal.
Try your best thats all anyone should hope for or expect, be calm and humble and proud in the knowledge that you tried hard and even if you didn’t get the grade expected, then carry on move forward with even more determination.
We have literally hundreds and thousands of opportunities in our lives so don’t worry now and go forward.