Around the same time last month (about a week after my period) I broke out on the right side of my face with two pimples and one on my right cheek (big pimples) and it's weird because the same thing this month... A week after my period I got them on the right side of my face as well (two big ones) and I'm Seeing a pattern here... It's because maybe it's after my period... Or because I wore makeup to sleep. Because last month there was a Halloween party (Oct 21st) and I was so drunk I fell asleep in my makeup, the next day I felt two pimples forming, and the next day, two pimples were fully formed!
My acne is mainly hormonal, I'd get one to two pimples a week before my period, but as I said earlier, last month and this month, I got three a week after my period, which was probably caused by wearing making to sleep/drinking alcohol/ not enough sleep. It's weird though because last month, I got them the next day! This time, about four days after!