Hi... I had sex with my bf 2 days before my periods. Like i have them on 18-19 evry mnth n i had unprotected sex on 17. Bt he was careful witj the ejaculation so that it won,t go inside and as a precaution i took the ipill within 15-16 hours. Bt now its been 3-4 days  since my expcted periods date.like i have them on  18 evry month, bt its 20 now n i have not had them. Should i see a doctor???? M tensed.