When to stop using Retin-A if no results are seen?

Hello, I've been using Retin A for 16 weeks now and have not seen any resutls. As a matter of fact, my skin has gotten worse and more oily. I went to see my dermo becasue I was having a mild breakout on my chin. He perscribed me Retin A, told me to wash my face with salicytic acid morning and night and to spot treat with Benzoyl peroxide 5%. Now I have acne on my jawline, below my nose and my chin has gotten significantly worse. Should I stop using it? If so what will happen?