hi, yesterday i spotted a small round shaped purple lump on the top of my penis, inside my urethra, at the right side, it doesnt hurt though it stings a little on a scale 1-10 i d say 2-3. it looks like some short of a bruise or some kind of infection, but i dont know, i m pretty sure it cant be there more than 3-4 days i would have noticed, additional info: i havent had sex about 1 month now