"She beat the record of climbing Mount Everest last month eight hours 3 minutes and 49 seconds" I mean know this is fiction, but that's a bit too much (as in probably physically impossible which so are the zombies,but for it to be scary it also needs to at least remind of reality imo). I highly recommend changing this part a bit
"Passing miller street my speed 30 miles per hour, after a few blocks, the speed 40 miles per hour, and going up the highway my speed was 60 miles per. Even though I was about top speed, my conscience told me to go faster. When I reached my destination I went 120 miles per hour, passed 18 red light and 5 stops signs." unnecessary, too much detail. Try to mention things like this ( "30 miles; an hour and 28 minutes; 19 cars") as little as you can if they don't play a big role in the story/are not that important also try not to be repetitive.
It's hard to understand where is a conversation happening so you could just use quotes or such to mark where is starts and stops,.
Also THIS: "I ate my puke and ran back the way I came." What.. did you just.. do? Please fix that hahah
"Bam! Bam! Ruuugh!" unnecessary
Grammar mistakes & incorrect tenses in some places.
[You don't have to change anything if you don't want to that's just how I personally would see it as huge improvement]
The story itself is quite scary and I didn't read it fully cause I don't enjoy that type of stuff, but you managed to make it disturbing and that's a really important part in making horror type of stuff, so - great job! hahah