Retin-A will truly not help you very quickly. Retin-A and Accutane work through the same mechanism, which takes a long time to take effect. In fact, it can actually make it worse for a while. Whether you use Retin-A depends on how long your cycle is.
Mind you, I have had severe acne before, but not from gear. Accutane worked well for me, but neither it not Retin-A is a drug with short-term benefits.