How can I forget this ever happened? Please brighten my feelings?

im so embarred still. today in school i was walking down the hall when out of nowhere a bigger kid pushed me into these really popular/hot girls who then laughed at me when i accidentally grabbed one's to stop myself from falling. everyone around laughed and i immediately turned red. the girls are a year younger than me, freshman, and i know theyre popular cuz theyre really pretty and i think two of them (one I landed on) are cheerleaders so... but what was even more embarring was when the girl screamed "ewww.... get off me little lepreuchaun" (i had a green shirt on light red hair used to it) i apologized, picked my books up and left. im small thanks to my moms side and both grandmas cuz im 4'8"/77lbs, the girl i bumped into had to of been at least 5'10" cuz my eyes didnt reach up to her chest area. so idk im still embarred about it and don't know how i can ever forget it happened. man this was supposed to be a good day cuz it was a half a day. now im worried about whats going to happen tomorrow when i p them again. Will they say something to me, and if so, how should i respond? im also embarred how theyre younger than me and can look down at me as if im younger than them (even tho im also used to younger kids being taller than me too, these girls seem the type as if cuz theyre taller than me, they look down on me as if im a little 5 year old) please help me out and courage me up somehow. i dont want to go to school now