diarrhea..

from the plan b pill? my period is due the 29th but i’m 100% sure i got it.. (bleeding started thursday with the brown stuff than friday it became red & than brown & then back red) i know they say with the pill you bleed either a few days after or a week after, or early or late! i’m bleeding early... i usually get period poops but semi hard, semi soft! i’m having runny diarrhea, is this from the pill upsetting my stomach? i drank coffee it gave me diarrhea (on sunday) & than i had taco bell it gave me diarrhea (today)? i wasn’t sure if diarrhea was a symptom from the pill or could it be from my period?