hey, first of all, I would suggest you keep calm and stress less. even though I have given the same exam and I was in stress too, I was scared that what will happen, how much will I score, and which college will I get into. but trust me nothing happens when you stress so much.

here are some tips for you that will help you to concentrate more and worry less

1)  sleep well

2) eat healthily

3) take breaks in between

4) focus  more on weak spots

5) give more tests and test your knowledge

5) have confidence

just believe in yourself and trust me you will get results according to your hard work. so just focus.

I wish you all the very best. do your best in the exam and have faith in yourself