I've read a lot of messed up stuff as well (when I was younger and didn't have as good a sense of moral boundaries and my own triggers) that made me feel incredibly guilty. But remember that while you may have enjoyed reading that stuff in the moment (which is understandable - even unethical content can be written well), you clearly felt guilty aft......
I'm not entirely sure if you're talking about an anxiety disorder or if you're talking about anxiety as in something you get sometimes in certain situations...but to me this sounds completely normal? I've had social anxiety since I was thirteen, so this is more or less just my opinion. It doesn't sound much like what I would associate with anxiety......
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