This does sound like ocd. It's okay to post here a couple of times by the way and it has been awhile so we will help! In just about all posts here, the risks of how one gets HIV are given. They include: having unprotected vaginal or oral sex or sharing IV drug needles. IV drug needles are not needle sticks. They involve injection, plunging action. Not like getting poked or stuck by a sharp object like a staple. Now, it probably won't float to keep asking this question since they have rules about posting here, so you need to internalize that. Talk back to your OCD and remind it that you know the risks and unless it is one of the three things I just mentioned, it is not a risk. Air inactivates hiv. Anxiety disorders like ocd ARE treatable. If you have suffered this for a long time and based on your posts, I'd guess you have. You would best be served by working with a psychiatric professional to overcome it.
Seek therapy because you already know all you need to realize you had no risk. Only non-sex risk is sharing hollow needles that you use to inject with, and there wasn't any hollow needle attached to the staple. It is unfortunate that you are fixated on a disease that you have no risk for to the point that you think it is all around you when in fact it is NOWHERE near you since you don't use shared hollow needles.
https://
www.medhelp.org/posts/HIV-Prevention/HIV-risk-from-door-handle/show/3062463
https://
www.medhelp.org/posts/HIV-Prevention/HIV-risk-or-irrational-thinking/show/2984489