Hello Dew: Thank you for sharing your concern here on PC. I noticed this is your first post. So... welcome to Psych Central.

I'm sorry I don't think there is a lot I can suggest to you with regard to all of this. Hopefully there will be some other members, here on PC, who will have some insights they can offer. What I think I can say based on all of the posts I have read, here on PC, is that internet porn can be incredibly troublesome at least for some people.

You asked if you are sick, if you're overthinking this, & if your worries are justified. I'm not a mental health professional. So all I can offer you is my personal opinion. But my thinking is no you're not sick. Yes perhaps you may be overthinking this. However your overthinking is a part of the problem not a separate issue... if that makes any sense. It is a symptom, I would suggest, of the anxiety you are experiencing.

You asked if you should seek therapy. Yes, at least to my way of thinking, therapy would be a good way of addressing your concerns. It can be really helpful to have someone, in real life, you can talk things over with. Allowing these sorts of concerns to continue to rattle around through your thoughts, so to speak, can have a way of making them grow even bigger & more confusing.

I personally don't think you're in danger of hurting anyone as a result of all of this. Just the fact that you have the level of concern you have over it suggests to me the likelihood of your hurting someone is vanishingly small. The only person who is being hurt here is you. So please do take steps, in whatever way you can, to put the fears you have to rest. I hope you find PC to be of benefit.