Hi, I'm 15 years old and I've been worried about something that happened a really long time ago. No, I've never had sex/used drugs/any of that stuff, but when I was 12, I was playing with a bunch of travel pins at a gift shop. While playing with them, I accidentally got poked with one - I looked at my finger, and I saw a bit of blood (it looked dried for some reason). In the bathroom, it took awhile to wash off the blood - I wasn't sure if it was mine or if it was from the travel pins in the basket. Either way, I was extremely paranoid, and I wanted to die after that. Since then, I've calmed myself, and I don't seem to remember any week-long flu that seems to come with acute HIV infection afterwards. I know this is crazy, but is this a possible source of infection? Now that I think of it, I might have had a cold or two (I just started going to school in the city/subway), but nothing super-serious that forced me to stay home for a week or so.

Please help - this has been plaguing my mind for the past three years and I really hope to get it resolved.

Thanks in advance.