Am I late?

It's been over a year that my husband and I are TTC, but no luck. My lmp began 1/31 and ended 2/5. A total of six days. 12 days later, I started spotting very light pink for two days and then the third day a little darker but not red then on the fourth day it was very light again. The spotting didn't last a whole day... It was on and off for those four days. I was to expect my period 3/2 but nothing. Took two pregnancy tests that week and they were negative. Took one more yesterday 3/9 and it was negative. According to my calculations I am 8 days late but I'm not getting any positive lines. At this point I don't even know what to think...