HELP PLS

Mia

so i had sex on the 4th of august which was about two days after my period. we used a condom but i was paranoid and took a plan b about 17 hours after. I was supposed to get my period 3 days ago according to my birth control that i just started taking regularly. I was late by 3 days but when i checked today, i was bleeding slightly but it was brown and sorta dry. Is that normal??? should i be worried?? i took the plan b within 17 hours