I'm 18 and have mild acne on my chest, upper back, face, shoulders, neck, and even a little on my arms. What should I do?

My dad and grandpa had it real bad when they were my age. It's really annoying (had it for the past 4 years) Unfortunately it's genetic, so no matter what I do, the **** won't go away (I even tried proactive and it actually made it worse so I stopped using it) It's not like I don't shower, I do and scrub the **** out of it to try to get it to go away. I exercise a lot, which causes me to sweat,but I eat fairly healthy. Am I doing something wrong? Am I just going to have to wait it out and grow out of it? "