How can I get rid of my acne within two months?

I've had acne for a very long time. It left some scars on my face that are now fading away, but now and then some acne just comes back up again. I am now 18 years old and this has been ongoing for the past 6 years. I know that some foods cause me to break out, and whenever I drink soda I break out too, so I'm strictly on water now. I've been using a lot of different kinds of medicine to deal with it and some helped, some haven't, but now I'm just tired of it all. Does anyone have a skin care regimen that really works for them to share with me? And also, some advice on what kinds of foods to eat and stay away from? Thanks! :D