I had some bleeding (light for about 2 days) 4 days prior to AF being due(i'm usually very regular) which would have been 12 days after our last time having sex.  Today, which would have been when I should be having AF I've had mild cramping and my right side lower back is hurting and a headache.  Wondering if I could be pregnant, I almost hate to test because we have been trying for a year to get pregnant with no luck.