Adapalene and Clindamycin and Purge Week

Hi I was prescribed Adapalene and Clindamycin by my dermatologist. I have only used the clindamycin for the past week bc the adapalene scares me. I've heard of a purge week while on adapalene/differin.

How long did the purge week last for you? Do you wait a certain amount of time when applying it and the moisturizer(the directions weren't clear there) Any tips or things you experienced while taking these.

Thank you