There has only ever been one transmission this way. It happened in a prison and a lot of blood was transferred. You are worrying for no reason.
dude,
same as me u are....i also dont know what to do....some things are out of ctrl in our life...i am in the same boat as u now...for the below incident
http://www.medhelp.org/posts/Obsessive-Compulsive-Disorder-OCD-/OCD-about-hiv-syringe-prickhelp-megoing-crazy/show/2133516
Good insight, you are correct, it sounds like OCD and you will need to find proper therapy to learn how to manage the symptoms for the rest of your life.
Seems my phobia to needling stabbing is really not alone. I seems begin to realize that my exceedingly obsession is a OCD....
Please read every other post on this exact same topic.