What kind of acne do you have? And why do you have it?
If the kind you have is the red bumps that hurt when you touch it, then that's SERIOUS acne and you should see a doctor for accutane. If you have acne because your face is oily, you should see a doctor for accutane. If you have acne because of poor hygiene (ie, keep touching your face, never wash it, etc etc) then try washing your face at least twice a day.
When I was younger, I used to have an extremely oily face and my whole face was covered in those red bumps. It hurted like a mofo. I went through retin A (both gel and cream), antibiotics, over the counter, etc etc, but after being on accutane for about 3 months, that solved the problem. However, it is a dangerous drug as my side effects ranged from dry lips and mouth to bleeding nose, rashes, and minor headaches.