Take action

Priscilla

So I took the take action pill a day after intercourse which was the 4th of July. So I had intercourse the 3rd of July at night and the next morning I took the pill. Well today is the 8th and last night I seen on my panty liner that I had brown? Should I be scared or concerned.. my period should start the 24th of this month . I researched that plan b or take action has an effect on your menstrual cycle. Is that true?