Do you think this is fair?

I don't know what to do. My step dad grounded me for a month for cheating on my final exam last Monday. I was pretty bummed out that I would only get a month of freedom left before I go back to school. I mean I am not even allowed to go outside. Yesterday afternoon I was cleaning the windows and I saw my friend outside and I wanted to step outside to say hey. My toes barely touched the concrete and my step dad pulled me back in and said you will not step one foot out this front door until your ungrounded and it was embarrassing because he yelled that with the front door open. So that made me mad so I looked at him and put both of my feet on the concrete that time and I started to dance and I was was saying, "look at me now both feet out the front door!" he was just standing there watching me with a mad look on his face so I started to run into the street and when I ran out there he started to run after me and when I started to run on the concrete on the road i forgot I was barefoot it was burning my feet so I ran back inside and now I'm grounded for the simmer and now it hurts to walk because my feet hurt. I am in so much trouble now and I can't leave the house which means the front door until the first day of school. So I have lost my freedom do you think this is fair?