My periods finished on 10th of dis month, i

Patient: My periods finished on 10th of dis month, i had sex on the same nite and next day and experienced spotting on 11th, after that it was clear, i took i pill on the same day due to fail of precaution, on 17th morning i started bleeding again, not spotting but proper bleeding, its 18 today and i am still bleeding lik i have got periods again….is there something to worry about

Doctor: