AHH! Oh No!?

AHH! HELP! I am going into highschool tomorrow and i got this index card in the mail with my name and homeroom and im sopossed to bring it the first day of school and i lost it! I'm looking frantically but I can't find it anywhere!!! And I dont wanna start school off with a bad reputation of a forgetful student, and i dont wanna make a big scene and all...HELP!