Started Cephalexin october 10th a day before starting my BCP and while on my cycle. Cycle ended two days after I started BCP october 13th and three days after taking Cephalexin. had sex on october 17th the seventh day of taking Cephalexin and 6th day of BCP. first round of Cephalexin ended on october 19th and had sex again on october 21st. Cephalexin started back on the 28th and ended the active pills on october 31 then had sex again on November 2nd 2015. Can I be pregnant?