My pd is 3 days late I have 25 day cycles which is always on time. Last pd was Dec. 3-8th.  I thought I was going to start I had slight cramping and tender breast.  I had nausea last night and my stomach has felt weird this morning.  I felt tightness in my lower abdomen like I was going to start and it went away.  No more sings of flow! I tested with a clear blue digital yesterday and it was negative.