Should I explain this to my mom or would she send me to rehab right away?? Kind of long but I need advice!!?

Apologize to your mom and ask her if she will sit down and talk to you. Explain that you know you were wrong and need to figure out what to do next. Make sure you tell her you will try hard not to hang out with those influential kids again. Don't go near it again or you will create yourself a really tough situation in life!