I have bullies all gaining up at me at school, what should I do?

Today at school we had a sub. but at recess my wrist was hurting and I was holding it because it really hurt! So this kid in my cl says to a girl in my cl named Kelsey that I cut my wrists, which I didn't! So in a really mean way she said to me: Emo Freak! and that really hurt my feelings, so I ran in the coat room and starting crying my eyes out for a few minutes untill these 2 girls came into the room and saw me so I went into the bathroom and started crying and one of my friends saw me and told the whole cl I was crying! So everyone came over to me but then it was time for lunch so we went to the lunch room and all of my REAL friends who were in the other cl came over and helped me feel better and while I was crying I told them what Kelsey called me and I told them she was a fu**ing idiot! Well, Kelsey didn't hear that but her friend Mackenzie did and told all of her friends and supposively my "GOOD" friend Matthew told everybody else in the cl, and was talking about me! I know I shouldn't have called her that, but idk!!!! I only had 4 friends in my cl who weren't all gaining up on me! Well, in our next class before the teacher came into the room I was walking past Kelsey to get to my seat and she said "You know I was just kidding right????" (but NO! she wasn't! she was just saying that!) so I said " It didn't sound like it!" So I sat back down in my seat and her and Kelsey were making fun of me and mocking me saying, ugghhhhh It didn't sound like it duuhh duuhhh duuuhhh!!!! So that made me cry again! Then finally in the hallway I was leaning against the wall and Mackenzie had to get by me but she could have went around me, she had the whole hallway! So she kept saying escuse me, escuse me! But I wouldn't move! And throught the whole day I wouldn't talk to anybody exept for my TRUE friends! so she kept say hi over and over again! What do you think I should do!?!? Should I go to school tomorrow? What if they are still mean to me? and Should I say anything to Kelsey and Mackenzie? Or should I just ignore them! and finally what about Matthew! Should I talk to him or ignore him, or tell him how I feel about him doing this to me! Please help me! PLEASE! And please answer all of the questions! PLEASE! :) :D