If the syringe is new, there is nothing you need to worry about.
At this point, everyone has reassured you. Continuing to ask for it is part of the ocd/anxiety cycle. It isn't useful at this point and you need to seek medical attention if you are suicidal. You also should work on treating the ocd/anxiety aggressively.
Yes, it is real in your mind - but a chat forum can't help you at all. Try the therapy again because you are wasting your life when you go on forums.
Your anxiety is out of control but this is just an hiv prevention forum - and you don't have hiv.
Seek therapy, because lying in order to get a medication that you shouldn't take shows that you need professional therapy - no one on a chat line can provide that help.