Me and my long time partner had sex on my 14th and 15th day and (he came in both days) counting from the 1st day of my period, my cycle is usually 31days but sometimes it varies for 29days only. My expected period is Sept.26 or 28, but it's already 3rd of Oct. and i still don't have my period. I missed it for almost 7 days now. could i be pregnant? hoping you could help me on this.