My mom just found out i was drinking?

My friend Marisa was over, and we were just having fourlokos but then about an hour ago she started puking, (my rooms in the basement) and my mom was getting ready for work upstairs, heard, came down and was like whys she vominiting, i said she was feeling sick and; i got in a-lot of trouble this summer at the end from drinking when my parents found out...but anyways my mom said to have her call her parents and have them pick her up, she called one of her friends and they picked her up and broght her to another friends house. my mom and i got in this huge fight and told me to leave or shes calling the cops, so i left and walked around, then when she left i went back home. I still ahve the cans hiding in my room and i have 2 unopened cans, we only had 1. But I dont know what to do.. i mean i can make it look like we didnt drink and get rid of the cans somehow but i dont know what to say or anything, and im really scared when she gets home ill loose my job, my car, and my life. What do i do/say? ive got work 2pm-7pm and she said shed be home at 6am but shes scheduled from 3a-3p...help