To me that's the very reason why I read that people should never touch the bare needle (inject or drawing) with anything and to never ever wipe the needle even with an alcohol wipe.Just thinking, did you touch the tip of the needle with the wipe? I only ask cause it may be possible you ended up with some of the wipe fabric in the needle and injected that into your ass. I hate to even ask this as I'm sure someone will thinkn I'm coming to defend this lab, but it's sincerely just a thought. This would be a greater concern to me than it not being sterile.