Help me

I’m in year 12 and today I finished classes early. So, we get to leave school earlier. I took a bus from my school to the city and then home. My mum found out and is gonna yell at me when she gets home. Please help me. What do I say? She shouted at me saying I can’t have freedom???

I literally never go anywhere, I only went to McDonalds today and she’s making it seem like I went to someone’s house to do drugs!