So here's the gist: my last period began Sept. 3rd. (I'm on a 28 day cycle). Therefore my peak fertility day was around the 17th. I had sex on the 15th and 16th and then a few days after my peak fertility. Here's the catch- I missed my whole first week of birth control pills, so that whole first week after my period I was completely unprotected. Basically I started a new BC pack one week late. I should have gotten my period yesterday (Oct. 1) but am late and have been having awful cramps. Took a test last night that was negative. Thoughts? Suggestions?