I had a blood test done today. to see i i was pregnant. And the did the one where it gives you the numbers..and mine came back as 0 she said. But had unprotected sex last month round the 8th and he came in me. haven t taking BC all month cause afraid i was prego . also missed while first week of birth control pills then we had sex.. was suppose to stat my period jan 1st still hasn t came. have sore nipples . help!!