What Causes Pain & Swelling In The Penis After Sex?

...sir,.i am 25 and have 1st time sexed.the wife husband is a driver.we did 12 times in last 4 days.on 2nd ngt i saw my penis has pain and heavy swelling.the upper part of penis has swallen heavily.is this symbol f aids.if ys,plz suggest detail prevention.exsise.food.evry thing plz.