Am I allergic to the Taro-Clindamycin/Benzoyl Peroxide Gel?

I started using the prescribed acne medication only about 4 days ago, and it seemed to be fine at first. Yesterday I noticed some areas of my cheek was slightly red and felt like it was burning. I applied moisturizer and thought it was just the cold air drying my skin out. But today I woke up and the same regions on my cheek and some parts on my chin were very red, slightly swollen and bumpy. It feels itchy and burns when I scratch it. Am I allergic? What do I do? How long will this last?

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