Go to a pharmacy and buy some 5% Benzoyl Peroxide, and some soap. You can get generic benzoyl peroxide very cheeply, and it is just as good as the brand names.
Wash your face with soap and warm water before bedtime, and apply the benzoyl peroxide to the areas where you get acne.... forehead, nose, cheeks, chin.
Your acne will get better progressively. You may need to increase the application to twice a day, depending on how you go.