birth control/period question

i know these posts get kind of annoying but please bear with me! 😂

so eve said my period should have started the 18th. i take birth control pills and have been for almost a year. i am pretty good at taking them regularly.

i took the placebo on the 18th and the 19th. on the 19th i had a light flow and some mild cramps. it’s pretty typical for my periods now to be very light since i went on birth control. but yesterday (the 20th) and today (the 21st) i’ve has absolutely 0 bleeding. some very light pink discharge at one point, but that’s it. that’s like way too short a period right? i didn’t take the placebo yesterday.

can someone just tell me what to do? thank you 😂