i have a quick question. i have this red spots on my penis that are flat, hav never broke, never bleed or any kind of discharge. they never itch or irritate me at all but they seem to come and go. i just got a through test today for every type of std and im waiting on the results. after sex they seem a little more noticeable but then go back to normal. i had an std test about 6 months ago and test came back negative. should i be worried?