Plan B question

So I just had the best revenge fuck ever but the dude busted in me. I’m due to start my period today (12/16) but I literally just took a plan B as a precautionary to avoid pregnancy (yes I know the only way to really avoid pregnancy is to not have sex and/or birth control and condoms). I’m obviously not on birth control. I’ve never taken a plan B. What should I expect?

I take 100mg of progesterone nightly for my hormone issue (have been on progesterone to make me “regular” for a few months now). Does that matter?

****to the rude folk who tell me to “read the leaflet 😑”.... I did? Read it front to back, didn’t mention anything about hormone therapy (my progesterone) & it did let me know what to expect, I just wanted real life stories of what to expect...