Acne problems ?

ever since i was 10 , i had lots of pimples all over my face (expecially my forehead and chin) , and i can't seem to find anything to get rid of them. i have a pretty healthy diet, and i drink atleast 5 bottles of water each day. ive tried lots of different products , but nothing seems to work ! if anything, they are probably making my skin worse , because my skin is very sensitive. please help ? thanks !