I must've ovulated late this cycle as I'm 6 days late for period and still getting very very light lines on some 10m/iu cheapies from the internet.  Today was the 4th day of testing so levels should be 4x what they were on the first day, but all I saw after testing w/fmu just now was a line fainter than all the rest.  I also had some cramping twinges last night in my the middle of my groin area that didn't hurt and weren't anything like period cramps, but no spotting or anything.