Worst day ever...What should I do??? :(?

This is the worst day I've ever had being in the fifth-grade. Okay so this is what happened. This girl name Raylette her mother came to the my school last Friday and said stuff about me calling Raylette names. I never called her name. I just said to myself once " Why is she on my field day team?" The only I said that was because Raylette is a slow runner. But her mother said a whole bunch of other things that I didn't even say to her. So that's what happened in Mrs.Contarino's office. Okay so this is what made my day go even worse. During lunchtime my lunch teacher, Mrs.Woodstock, was being so mean to me. She made my table go last on the lunch line because I was apart of the table. I asked her to poke a hole in my shoe because it was dangling everywhere. Usually she would oh sure honey. But she this time no, go sit down. The only reason she was being mean to me was because Mrs.Contarino told her what happened in the office! And I repeat, I barely did anything to Raylette! Then during science I was doing a funny dance and my teacher Mr.Weber called my friend and Devin (she's a girl) up to his desk. He told us to stop laughing and why were we laugh. I told him what I was doing and he asked me why was I doing a funny dance. I didn't know what to answer so I just like stood there. Then Mr.Weber told me I shouldn't be fooling around because I was the girl that was in the office today and if he sees me fooling around like this again I'm going to be sent to Mrs.Contarino's office again. At the end of the day I thought my best friend Julia was mad at me. But then my friend Michael told me she wasn't mad at me. So at the end of the day Julia came up to me and asked why would I think she was at me. I decided to make a joke out if and said "Because I have bugger boobs than you." Then Mr.Weber was coming back to the classroom so I tried to grab my back pack to run back to my desk quickly. But he called me up and said "How many time do I have to stop you from talking and fooling around?" After he told me "That's it your going to Mrs.Contarino's office." I said " But Mr.Weber I'm sorry and he said " But no! I specifically told you to stop and you didn't listen. I got sad and sat down at my seat and started to cry. I cried walking to my bus, going on my bus, going on my bus and the entire bus ride home. When I was walking home I even cried more. My older sis Mina asked me what was wing but I ran into my mom's room. She knocked on the door but I wouldn't let her in. I felt bad so I let her in. She asked me what was wrong and I explained everything to her. She said it's okay just the tell the principal the truth. I stopped crying and just laid there. A few minutes later I got a call from Mrs.Contarino on the house phone and she asked to speak to my mom. I told her my mom wasn't home. Then she asked me for my mom's cell phone number so I gave it to her. After I explained to her what happened with me talking a lot in class. She said well honey next time in class your suppose to listen and behave yourself and she said she would talk to Mr.Weber. I felt relieve after that. I'm just nervous about what I'm gonna say today. How am I going to confront everybody??? What should I say if they asked me why was I laughing while I was grabbing my back pack??? What am I gonna say to Mr.Weber!? Please help! :( By the way I'm in fifth-grade!