My period began on January 29, 2014 and ended January 31st. I had sex on Feb 1st right after my period ended. We did not use a condom but used the pull-out method which I am aware isnt the smartest method. I am on birth control and just started my new pack this morning Feb 2nd since I was on sugar pills last week. I am wondering what the chances are that I could be pregnant? Thank you