I got accepted into stuyvesant...... my mom trashed the letter with my homeroom in it... can anyone help me?

When i got my highschool results, i was extatic. Then i got this big sized white letter that was from stuyvesant to me. I was so happy that i didnt even look at the letter paper and just took the things out of it. Then, later, my mom trashed the letter paper and then my friends told me my homeroom was on there... i dont want to be the kid that is totally clueless on their first day. Help me please???