My last period was sept. 17. It lasted its normal 5-7 days. My period was due oct. 16 and it has not shown up yet. Today is the 17. I have taken 2 pregnancy tests and they are both negative. However, for the past two weeks I have been cramping. It feels like my period is coming but nothing has shown up. The cramping is now in my back as well as my stomach and I get a weird sensation in my breasts. I don't feel 100% energetic. I just thought maybe it was working 2 jobs, raising 3 daughters alone and coaching on the weekend. Is there a slight possibility that I could be pregnant even if the tests have both shown up negative?