Hi that is a very common problem. In my own personal experience, believe me I once had a very flawlwss skin on my face until my greatest nightmare, PIMLES, ACNE and BLEMISHES. I have tried everything as well but now i have found the cure. I want it to share with you but you have to try the natural thing first.
There are many factors that causes pimples. It might be your puberty stage (raging hormones), hormonal inbalance, skin sensitivity (skin type), unhealthy diet, stress and emotional disturbances, and the use of wrong cosmetic products.
1. Try to stop using anything on your face and start researching about your skin type.
2. Use a PH balanced (PH 5.5) soap or facial wash (non-fragrant)or try to use antibacterial facial wash or cleanser that ofcourse suits your skin type.
3. Have a healthy diet. Increase fruits and veggies (at least 5 servings a day)on your diet and avoid eating oily and fatty foods. Eat fruits and veggies on an empty stomach. Fruits and veggies are digested easily so if you eat them with an empty stomach vitamins and nutrients will go directly to your system. I have researched about this.
4. Hydrate yourself. Drink plenty of water daily even if you are not thirsty. Don't drink sodas, and artificially flavored juices for this mean time. This is to maitain moisture on your skin. Water is essential to our body and our skin has lipids that stores water or moisture.
5. Have 10 hours of sleep each day. Try to take a nap when you feel tired (of course in the right place and in a right way). Sleeping helps a lot to maintain a healthy skin. Especially sleeping during afternoon time. And ofcourse try to sleep early in the evening.
Try to do these simple things first for 4 weeks and if you still have pimples, just reply here in your comment section. I have researched plenty of things I can impart to you. But try to do it natural first.