Anyone ever use either of these? From my understanding, Tretinoin is Retin-A. I just got some of it, .05% from my derm, and my face is actually breaking out terribly with huge blemishes. He told me it would be dry at first and some people stop using it because of that, but to continue to use it as it would be smooth sailing from there. But he never told me I would break out from using it. And I am-- I am worse than I was when I first went in there. I can't call until Monday now and I knew I should have today =\ I read from -basically- a random website: "If used for acne the condition may worsen at first, then improve." But who really knows... is it true? About how many weeks should it take? I've been using this for 2 weeks now... and now it has gotten to this point.