Hello, I am happy to help you today.
It is not uncommon to have cycle related acne
. This sounds like it might be the case given your association with where you are in your "cycle" or pill pack. This sounds like it is of little concern. If you are bothered by it, one thought is to skip the "week off" when you get your period and start the next pill pack early. This is completely safe to do and might help to prevent this from occurring related to shift in hormone levels.
I hope this helps, good luck!!