1st dream since grade 8

Well anyway I ahd this dream/nightmare last night and was wondering if it meant anything....Anyway here goes.
I was in some future type place and was running from something(Cant remember what) anyway I was running toward the doors then I started to hear alarms and doors locking so I ran faster to see if I can beat the locking system. Turns out I didnt and there were some others who tried also. Anyway I was looking for another way out then I fall into some hole in the ground that leads to a all windowed classrom where mostly all the people in my grade where there. I found some of my friends there too. So I walked voer there to hang out with and asked them what was going on then all of a sudden these infected people with their skin peeling off and all that disgsuting stuff ran toward the windows and yelling something(Not sure what it is) and some of them had guns so they started to shoot at the windows. Surprisingly the windows didnt break so I assumed they were bulletproof. So some people in there and I started to taunt them by swearing at them and giving them the finger which just made them angry. So they started to rush so everybody started to backup and scream/cry cause they knew there was no way out of this. Anyways they broken the windows and they ran inside biting the top part of the hands to try and convert us to them I guess. Anyway I was running away from them but they were faster and got me. Except I didnt turn just felt the pain of the bite. I snapped the guys neck who bite me. I tried avoiding them some more which works cuz there all busy biting the others. Then im in a corner with this girl who was in the process of being bite by them. So I kinda told him off and asked him to bite me at the same time so he did and yet it stil ldidnt do anything. By that time I was pissed cuz I couldnt turn. Walked by the girl who was in the process of being bite and turns out he finished with her but she didnt convert just like me. So I asked her what we should do. She says we should just kill ourselves because we cant turn and we dunno what they'll do to us sicne we cant convert to them. So me and her grab a pencil from the floor cuz the infected people flipped the tables and desk that were there. Put the pencil under my chin...she did too. Was about to push upwards with the pencil but then I woke up.

That's my dream. Just wondering if it means anything and it was my first dream since grade 8 as I said in the title.