Used Retin-A and then had a chemical peel; now have some dark spots. Will these fade away over time? How should I treat it?

So I used Retin-a, only applied a peal size to affected area. Same week, I had a chemical peel. My face has some visible darker areas now. Local doctor said its not a chemical burn and its not hyperpigmentation. He said the skin has just been irritated. I seek your advice as to what I should do to treat the darker spots. I heard Hydroquinone is good, but when can I use this. Honestly, I don't know what to do. I'd appreciate any advice on treatment and also confirmation that the spot will fade.

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