I will make this short, I was kissing a guy two years ago and I had a piercing in my upper chin (spike jewellery) the guy had a nose bleed, I went to the bathroom and cleans the blood off, two days later I was playing with my baby brother and he cut his gum off of my piercing...I thought nothing of it at the time. It's two years later bow and my brother gets persistent coughs, is this a sign of HIV?