Acne, retin a, birth control?

Can you answer oxx_x’s question about Acne?:

Ok so I ussualy get pretty bad acne before I started my period so I went to the doctor and he perscribed me retin a (.25) and birth control pills. The acne has stoped coming but I figure its because Im done with my pperiod and it ussualy goes away until my next cycle. The retin a hasnt made my face peel at all? Do you think its still working? or i need a stronger dose.

Retin A Acne Treatment