period on bc ?

I’m new to how BC pills affect your cycle. I had my normal cycle last month and started taking my BC pills the day after it ended. I did have sex this cycle but we used condoms and none broke or were expired. I started my placebo pill week yesterday. When should I expect my period ? I know the hormones can throw it off and I do not believe that I would be pregnant. Just curious as to when I should expect it ?

I also have my normal pms (mood swings, sore boobs, and acne)