I took the first pill of morning after 39hrs later after I had sex and the second 12hrs after the first as instructed. I had sex Sept 27 and took the pills on the 29 but at the same time I found out that the 29 is my first fertile day. My last period was Sept 18 and next dated to return Oct 15 based on my normal cycle. But it's a day late and now am worried... Is it possible that I could be pregnant?