I am 12 days late for my period. I have tested at home and got a negative result. I just had a baby 8 months ago. My periods returned after 3 months. I have had a period every month expected for this month. My cycles are about 37 days long. I had Cramping around the day that my period was due but nothing happen. Is there a chance that I'm pregnant but its not showing up? Or could there be a bigger problem that is making me miss a period.