OCD, by its very meaning, typically consists of obsession(s) and compulsion(s), being so bad that it interferes with daily life, be it work, social events, relationships, friendships, family, etc. You are obsessing over gore, and compulsively ruminating - I expect you also check yourself (looking at something gory to test your reactions) and seek reassurance for this, which are all very typical OCD behaviors. It looks to me like it's interfering with your life; disordering it.

It's definitely worth seeing a doctor, to get a proper diagnosis (as fairly sure as I am that I know what I'm talking about, I'm still not a doctor, so I'm of course obliged to recommend you see one) and treatment, which would very likely be CBT.

Personally, I'd avoid taking something like Citalipram (SSRI) for it (I've been told it "can" apparently help with OCD) and to just go straight to the problem, rather than covering it up with medication, although I believe "they" typically like, in some cases, to mix the two, so the medication compliments the treatment. I say this, because some time back, before they took notice of my rather obvious OCD, "they" kept trying to fob me off with medication that did absolutely diddly-squat for me.

You're obsessing over gore so much, that it has become even more apparent to you. I guess it could make sense that you've desensitized yourself from some aspects of it, from so much focus on it all, but the flip-side is that it is so prominent.

I expect your focus on gore, has made you question yourself - "Am I sick?" and "Is there something wrong with me?" and even "Am I evil?" are all questions with which I'm more than familiar; it's entirely in human nature to ask questions like these - as far as I know, we're just assessing the situation, like our brains are so good at doing.

The fact that you posted in the anxiety forum, is also quite typical of OCD, because of course these sort of fears will make us anxious. It's no wonder if I have a debilitating form of anxiety, as I've had OCD since I was a child, which had been left to fester, because nobody would hear me out, when I cried out for help, in my own weird way. Lower your anxiety levels, and you can sometimes actually lower your chances of obsessing. Ever since going on Propranolol (beta-blocker, for my anxiety) I've had an easier time dealing with my OCD, ... not drastically, but noticeably.

Look up some relaxation techniques. Learn to use your senses to keep yourself grounded and calm: your sight, your ability to touch, your hearing, and all the wonders you can taste. Use candles, joss-sticks, relaxing music, beautiful pictures, and so much more - whatever helps you focus and mellow out. Use your body as an ally, not your enemy.