Anyone have experience with AF showing up on time after stopping the pill? What were your cycles like after stopping?

I stopped taking my BCP in September and didn't have a "withdrawal bleed". Today, (cycle day 28) AF showed up, 4 days early. This is my first AF since stopping the pill.

(I should note that I was on the mini pill, Jolivette, so no estrogen, just progestin)

I am relieved she showed up on time, but for some reason I still have questions!🤷🏼‍♀️