What are the chances of catching an STD during unprotected?

[inexperiencedpunter]

Yeah I have done research but what bothers me is that the research doesn't add up to the level of paranoia people seem to have, it makes me worry if I am missing something. And it depresses me so much, I wish STDs never existed

I want to have unprotected sex with a female human but I have OCD and I would worry about what if I caught something.