Hi, I got my last period on 27th september, and then I had sex on 4th October i have a cycle of 30 days... We used condom and it did not get torn,it did not split, I also had morning after I pill, and after 1 and a half week had dark brown colored bleeding for 3 days ( not very heavy) and now I m 4 days late for my period as today is 31st.... Can I be pregnant?