I’m using Retin-A for acne but I have some dark spots from old pimples that I want to clear up. Hydroquinone 2% and 3% have proven ineffective on my skin. I’m using Vitmain C cream right now, it’s only been a week but there’s been irritation, puffiness, and a rash. Should I stop the Vitamin C cream or is this just my skin getting used to it? I’m also looking into Kojic Acid and a glycolic peel overnight Cream by Garnier if Vitamin C isn’t a good option. But how would I use these. Can I mix them