If you’re disappointed
It’s not the end of the world. If anything, it’s a good thing that you didn’t do as well as you thought. You’ll now know for next time where you need to improve.
Don’t let it get you down, just be thankful that whatever went wrong, went wrong now instead of in June! Almost all students get a better mark in the Leaving than in the Pres, remember that.
Moving forward, try to pinpoint your weaknesses and then work on them. You won’t have any other proper exams like these until the actual Leaving Cert so if you want to see that you’re improving on these weaknesses, I would recommend asking your teacher to correct extra work for you. I did this a lot with English essays and it brought my mark up by a lot because I kept seeing where I went wrong and rectified it for my next essay.