Affirm Laser and Tazorac?

I did affirm lasers for my pitted scars. After getting 4 treatments (now 5 or 6 months have passed since my first laser), I still don't see positive result; the scars are still pitted and remained red. I was then told by a friend- I should have stopped using Tazorac COMPLETELY 1 week prior to any laser resurfacing treatments. I was never told by the doctor's office to stop using ANYTHING. I already spent around 2k USD. Do I need to start all over again?

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