My acne is putting me thru hell! I can't wear tank tops because i am so embarassed! HELP!

I have really bad Acne EVERYWHERE! my arms, my chest my back and my face. I try and try and try all these different methods to get rid of it, BUT IT WONT LEAVE! :-(. Can someone suggest some tips? because i'd really like to be the in the tanktop too instead of that one girl who is wearing a teeshirt to the beach when everyone else is in bikinis.