Why isn't Retin-A working anymore?

I used to be on retin-a .05% a year ago, and it cleared up my skin until I started breaking out due to stress from college. I stopped using it after a year. Then I started using ziana 1.2% w/ Solodyn. After 8 1/2 weeks, I still continued to break out more than I have before, and only on the right side of my face. Now Ive been using retin-a .05% for 3 weeks. My face looks even worse now, I break out in 10 different places every night, and throughout the 11 week process, my skin hasnt been clear

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