Frustrating Acne problems! please help!?

Hi, i am a 16 year old who has benn troubled by mild acne for around 4 years. I have gone to the dermatologist for almost 2 years trying to rid myself of acne. My dermatologist has put me on so many different topical creams and anti-biotics, but nothing has worked. She has suggested Acutane but recently, she said i have improved and she did not put me on it. Now, all i am using is a normal cetaphil face wash and a topical foam which i use after i shave. Recently, i read that drinking alot of water helps improve your skin and flush out toxins from the body. I have started to drink alot of water daily and i believe it is helping a bit, but i am not sure. Every morning, random whiteheads pop up and what else is there to do but gently squeeze them and then wash your face? I am looking for natural "cures" for my acne, similar to the water solution. I also believe that i have high oil levels because about an hour after i wash my face, my skin feels oily and looks shiny.