Does anyone else..

Ladies on birth control pills, do any of you not get your period on the days the pack says you’re supposed to? (The pills at the end of the pack that don’t have hormones) but instead, get it during the middle of the pack? (When you’re technically not supposed to be on your period?

My pills aren’t regulating my period at all, I get it for about 6 days at a random time throughout the pack, but not during the 4 days that I take the placebo pill.

I’ve always had pretty irregular periods, but is this normal when on bc pills?