Do I have glycolic and salicylic acid burn? Now the skin's become dark. (Photo)

I been using Cleanser with 4% Glycolic acid follwed by Acne Solution with 2% Salicylic Acid. At first there's redness in my right and left lower chin, tingling sensation eveytime I apply the products then days after it becomes dry and flaky, now the skin become dark. I ak so frustrated and so stress seeing this dicoloration in my face, it looks like I have a beared. I am so stress seeing my face with this, please help. Is this a scar from over exfoliation or burn? Hoc can I treat this and make it lighten?