Hi, I have a combination skin, which means oily on my t-zone and dry on cheeks . I take care of my face real good. I wash it every night with a gentle cleanser , I moisturize it, and whenever I get pimple or acne I use the acne medicine and it will disappear. But in the few past days I got some pimples and acnes which just dont go away! And whenever they disappear new ones come out! Why is that? What should I do? p.s. I do exercises, and I eat healthy. And I m 18.