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I know this is better asked to my confessor but I don't have the option of going to confession before Palm Sunday Mass. I tend to be very scrupulous so I would like the seasoned opinions of the veterans here.

So I was learning about the distinctions of the sin of sodomy and related unnatural vices and came across a word I did not understand. Finding it on Wikipedia the page had images of the sɛҳuąƖ act. Now after seeing this I closed the page. After a short time vain curiosity got the better of me, I wanted to read the article to see what it said. I rationalized to myself that it would at most be a venial sin and went back on the page. Though I used my right hand to cover the right side of my screen to block the images, however when scrolling down there was a 3rd image which I managed to see. My right hand was a bit unsteady and instead of focusing myself to keep the image out of sight I had a quick glance at the image. I did not look at it long (probs less than a second) and did not see the 'parts' of it. I finished reading the page and felt regret.

I should not have put myself at the occasion of sin and I should not have used 'venial at worst' as an excuse to do so. Giving in to curiosity for vain knowledge was foolish. Did I commit a mortal sin? A venial sin? Or am I just being overly scrupulous and did not sin at all? I appreciate your advice. 

But I can guarantee that whoever looks with lust at a woman (or man)has already committed adultery in his heart.

I did not feel any 'lust' towards the images. (also they werent real people but CGI)