Busy week, sorry for the late reply.
First off, I liked it. It was semi-snarky and in parts reminded me of Stephen King when he goes off on a tangent. The main problems with it were in the prose. There are a lot of run on sentences. Sometimes that's fine, but in general, short, crisp sentences = better writing. There were plenty of times were instead of a comma or instead of and and and, you could have used a period, space, space, new sentence.
The passive voice is pretty bad. Passive voice slows down the narrative, pulls the reader out, and just doesn't read well.
"Bugs used to freak me out, and for a while I just couldn’t think about all those bugs eating my body. I would just be sitting there, trying to fade out, and all of a sudden in the darkness I would think I was in my coffin and I could feel the bugs burrowing into my blind eyes. I would scream and scream and the more I screamed the more I believed I could feel them wriggling around inside my squishy rotten head. It’s not true, though. I can’t feel my body."
Instead of all this I would just, try doing "I couldn't think", "I sat there", "I thought I was in my coffin", "I screamed".
You've already established it's a previous experience with the "used to freak me out" so you don't need to keep reiterating it with the passiveness.
Overall, content-wise, I liked it. I think for it to work, as it is a very short story with no real plot, you would need to do some trimming. I think shorter, crisper sentences would help tighten up the prose. I think some sentences need to be trimmed/removed. The paragraph with the girl drags on a little longer than it needs to. You made your point, so move on a little sooner. I think with some revision it would be a nice little piece, but I'm not sure where you would market it. Perhaps some flash fiction or something of that nature. Good job!