So I am using Tretinoin .1, I'm on my 6th month I'd say, well anyways, I also use Acanya (2.5 benzoyl and clindamycin) in the morning.. Well, I had this HUGE zit on my right cheek, and so instead of using tretinoin, (even though a little bit may have come in contact) I used the Acanya as spot treatment, now, today, One week later, I have a huge flat circle around what should be a tiny mark now.. why is this? What can I put on it to heal?? I've been leaving it alone and moisturizing with cera ve but nothing is working! Please help (its the big red mark