Tretinoin and home Derma Rolling?

I've been on Tretinoin cream for about a month now. I just ordered my home dermaroller and plan to use the 1.5 mm for acne scarring on my cheek areas. My question is what is the proper way to use both my home dermaroller and my tretinoin cream in conjunction with eachother. Should I stop my cream for about a week before dermarolling then a week after dermarolling begin my tretinoin cream again? and how often can I dermaroll with a 1.5mm? your reply is greatly appreciated!