Any advice for severe, stubborn closed comedones?

I have been dealing with closed comedones dotted all over my cheeks (~50) for the past 4 months. I've been prescribed 0.025% Retin-A (been using it for 3 months) and still no improvement. I exfoliate twice a day with a 2% BHA liquid, moisture with an oil free lotion, use a 10% niacinamide serum in conjugation with a 10% azelaic acid. I'm going to my derm next month. Anything specific I should ask her? Any advice for now? I am 100% certain it is not milia (when i get to pop one it's soft). Thanks

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