So I've been using Differin for almost a month now and while I can say I'm not as oily and my face has a better texture, BUT the pimples that have gone away is leaving red hyperpigmentation marks! I never had this many before using it and I feel like this product is making my skin worse with scarring! Should I keep using it? My initial purge is pretty much gone but the red marks it has left behind makes me feel even worse because I never once picked at my face. What. Do. I. Do?!