The Reawakening

So there i was sitting on top of a garbage truck surrounded by thousands of zombies and no way out, As i start to fight the zombies climbing up I get pushed and fall into the horde and as I open my eyes I realize that I'm in my classroom from 4000 years ago. So here I am 4000 years in the past trying to figure out what's going on I hear "Natu-san Natu-san NATTUUU-SAAANN" as I look up i see my ex-girlfriend who got my little sister killed in the past. I quickly look at her in the middle of my entire class estimating around 80 people and say "Were done Bitch leave me alone now" as I say that everyone looks at me surprised and after realizing in the past I was a pussy who wouldn't speak up to anyone and since I just got reincarnated i didn't realize till just now but i need to figure out what day it is. I went around looking for my sister and ran into my best friends Natalie Matt and Adam, i asked them what day it was and they replied "October 08th 2020" I quickly replied "what time is it", Which Adam replied "14:35 why are you asking?" after that i replied "The world's going to end in 25 minutes" They all looked at me like i was crazy so i said "Believe me or not but i must ask you trust me and please help me find my sister" they all see I'm worried so they nod they're heads yeah and we all go looking for my sister. After 20 minutes we find her and her best friend they're names are Addison (little sister) and her best friend Skyler and i tell them the same as the others and my sister's best friend thinks I'm lying but my sister quickly says "i believe you since you've never lied before and i don't have any reason not to." So we all run up towards the spare classroom on the third floor of the school and lock the door and barricade it up as well as check the cabinets for food since it's a cooking classroom and we find 3 bags of rice 15 bottles of water and 25 cans of beans along with some fresh fruit and vegetables in the fridge. As we look outside we see the apocalypse beginning and all my friends my sisters best friend and my sister all ask how i knew and i reply "you'll know in due time" So i tell them to get some sleep they'll need it. As they sleep i start cultivating my power back up and i start to slowly expand my inner power. After I cultivate for 3 hours i use a map to start routing a path for use to follow.