1st stanza, 3rd line: "mitt själ" -> "min själ"
1st stanza, 6th line: "Så kryper jag ihop" -> "Så jag kryper ihop"
1st stanza, 6th line: Hmm, this is a bit tricky, since it can be interpreted in different ways... but I'd probably say "...i mitt trygga hem"
2nd stanza, 1st line: "skitdålig" -> "skitdåligt" (an adverb) (You could also say "...jag mår skit", but I would say "skitdåligt" is better Swedish.)
3rd stanza, 1st & 3rd line: You could omit "det", but it works this way too.
3rd stanza, 2nd & 4th line: "all" -> "alla"
4th stanza, 1st line: "Jag tror att det är något fel på mig"
4th stanza, 2nd line: Once again, you can drop the "det", if you like
4th stanza, 4th line: "...som om jag använder..." or "...som om jag går på..." (I'm not very good at drug slang (a fact that has put a halt to one or more of my own translations), so I don't know if meth is called "meth" in Swedish (the real word is metamfetamin, kind of like in English (https://sv.wikipedia.org/wiki/Metamfetamin)), but according to that Wikipedia article it can be called "metatjack" in Swedish, but I don't know how common that is (the drug is apparently still uncommon in Sweden).
4th stanza, 7th line: "Och jag vet inte vad jag ska göra" or "...vad jag ska ta mig till"
5th stanza, 1st line: "skitdålig" -> "skitdåligt", again
5th stanza, 2nd line: "se" -> in this case "träffa" or possibly "uppsöka"
6th stanza, 2nd line: This is a tricky one, since "fucking" is used as an intensifier for "kill yourself", but in Swedish it would sound strange, I think. You probably made the best choice, but you could possibly drop the "också".
6th stanza, 4th line: "Razorblades" = "Rakblad", but I still think "Rakbladen" (with definite article) would sound better, as if he expects them to carry razorblades.
7th stanza: My comments for the 3rd stanza apply to this one too. I'm guessing the 6th stanza is in italics because it's spoken, and it seems like you forgot to turn it off for the 7th stanza (unless that's spoken too?).
Well done!! (And no, I don't think it's too literal!) :)
Förslag och korrigeringar är alltid välkomna.