How long will it take 0.1 Differin gel to work?

I have been using it for 4 weeks and my acnes only gotten worse! or:I have been using it for 4 weeks and my acnes only gotten worse!

I have been using it for 4 weeks and my acnes only gotten worse!

or:I have been using it for 4 weeks and my acnes only gotten worse!

Tags:pimples,