You are suffering from a very common problem that most youngsters suffer from ie Acne Vulgaris
....Before coming to the exact treatment, i would like you to follow certain precautions:
1. Avoid using any oily creams or lotions over face as much as possible. you can however use oil free moisturisers
2. Wash your face frequently inorder to keep it dry
3. Drink plenty of water
4. Try to avoid eating dry fruits
5.Avoid touching or squeezing of pimples
6. Avoid Hair oil
7. Always use a sunscreen (SPF> 26) when going out in the sun
Now in your case, you should follow the prescription given by the dermatologist
as in most cases, a single ointment doesnt help...your prescription includes and active drug with a specific face wash and a moisturizing lotion which is necessary in most cases of long standing acne,, and it will surely help..
and finally,,dont be stressed out.. as stress is surely a factor which increases pimples..
Dr Geetika Paul